* Framework Improvements:
  * Eliminated the StoreConfig class, and ability to work with Configuration through the Store object. Scope Config was introduced instead.
  * Fixed performance degradation caused by DI argument processors
  * Covered Magento library components with unit tests:
     * Magento/App/Request
     * Magento/App/Resource directory and Magento/App/Resource.php
     * Magento/App/Response
     * Magento/App/Route
     * Magento/App/Router
     * Magento/App/Http.php
     * Magento/Translate.php
  * Improved the Web API framework based on Customer Service
  * Updated the API Service Exception Handling
  * Changed the conventional notation of Vendor name in theme path: from `app/design/<area>/<vendor>_<theme>` to `app/design/<area>/<vendor>/<theme>`
  * Renamed the 3DSecure library to CardinalCommerce, and removed the unused flex library
* Themes update:
  * Updated the look&feel of the Admin theme
* Modularity improvements:
  * Introduced a new Store module. Moved all Store related logic from Magento_Core to Magento_Store
  * Moved the library part of the Config component from the Magento_Core module to the library
  * Moved the Session related logic from the Magento_Core module to the library
  * Moved the abstract logic related to Magento "Module" from Magento_Core to the library
  * Moved the form key related functionality to the library
  * Introduced a new Magento_UrlRewrite module and moved related classes from Magento_Core to the new module
  * Moved the resource model to Magento_Install module
  * Eliminated the Core\Helper\Js class
  * Moved the Email related logic from Magento_Core module to Magento_Email module
  * Moved the Cache related logic from the Magento_Core module to the library
  * Resolved issues which appeared when an order had been placed before the Magento_Payment module was disabled
  * Eliminated Magento_Catalog dependency on Magento_Rating
  * Removed the Magento_Rating module, its logic moved to Magento_Review
  * Moved the View related components from Magento_Core to the Magento/View library
* Refactored the following modules to use Customer Service
  * Magento_Multishipping
  * Magento_Paypal
  * Magento_Log
  * Magento_RSS
  * Magento_Review
  * Magento_Wishlist
  * Magento_Weee
  * Magento_CatalogInventory
  * Magento_CatalogRule
  * Magento_SalesRule
* GitHub requests:
  * [#520] (https://github.com/magento/magento2/issues/520) -- Fixed spelling in Magento\Payment\Model\Method\AbstractMethod
  * [#481] (https://github.com/magento/magento2/issues/481) -- GD2 Adapter PHP memory_limit
  * [#516] (https://github.com/magento/magento2/issues/516) -- Make Sure That save_before Event Is Dispatched
  * [#465] (https://github.com/magento/magento2/issues/465) -- Absolute path is assembled incorrectly when merging js/css files
  * [#504] (https://github.com/magento/magento2/issues/504) -- Renamed "contacts" module to "contact"
  * [#529] (https://github.com/magento/magento2/issues/529) -- Fixed exception at admin dashboard
  * [#535] (https://github.com/magento/magento2/issues/535) -- Fixed an issue during creating or editing product template
  * [#535] (https://github.com/magento/magento2/issues/535) -- Fixed Typo in the module name
  * [#538] (https://github.com/magento/magento2/issues/538) -- Fixed missing tax amount in the invoice
  * [#518] (https://github.com/magento/magento2/issues/518) -- Change to Magento\Customer\Block\Widget\Dob new version
* Fixed bugs:
  * Fixed implementation issues with Cron task group threading
  * Fixed inability to place order during customer registration flow
  * Fixed an issue where after JS minification errors appeared when loading pages which contained minified JS
  * Fixed an issue where it was impossible for users with restricted permission to export certain entities
  * Fixed an issue where checkout was blocked by the "Please enter the State/Province" pop-up for customers that had saved addresses
  * Fixed an issue where a fatal error appeared when trying to check out the second time with OnePageCheckout
  * Fixed an issue where a fatal error appeared when trying to create an online invoice for an order placed with PayPal Express Checkout (Payment Action = Order)
  * Fixed an issue where the special price for a bundle product was calculated wrongly
  * Fixed an issue where a fatal error appeared when trying to create a shipment for an order if Magento was installed without the USPS module
  * Fixed an issue where the Lifetime Sales and Average Orders sections of the Admin Dashboard were missing
  * Fixed an issue where the active tab changed after changing the attribute set
  * Fixed an issue with incorrect order of product types in the Add Product menu in the backend
  * Fixed an issue with saving the tier price attribute
* JavaScript improvements:
  * Upgraded the frontend jQuery library to version 1.11
  * Upgraded the frontend jQuery UI library to version 1.10.4
  * Modified the loader widget to render content using handlebars
  * Added the 'use strict' mode to the accordion widget
  * Added the 'use strict' mode to the tab widget

* Framework Improvements:
  * Fixed performance degradation caused by DI argument processors
* Modularity improvements:
  * Introduced the Magento_UrlRewrite module, and moved corresponding classes from Magento_Core to Magento_UrlRewrite
  * Moved all Install logic to the Magento_Install module
  * Eliminated the Core\Helper\Js class
  * Moved the Email related logic from the Magento_Core module to the Magento_Email module
  * Moved the Cache related logic from the Magento_Core module to library
* Indexer improvements:
  * Added execution time hints for console reindex
* Customer Service usage:
  * Refactored the Magento_Newsletter module to use Customer service layer
* Fixed bugs:
  * Fixed an issue with resetting customer password from the frontend
  * Fixed an issue where mistakenly the attribute of the Customer Address Edit form was cached
  * Fixed an issue where admin could not unsubscribe customer on the customer edit page in the backend
  * Fixed an issue where customers were always subscribed to the newsletter even if not selected during registration
* GitHub requests:
  * [#325] (https://github.com/magento/magento2/pull/325) -- ImportExport: Fix notice if _attribute_set column is missing

* Fixed bugs:
  * Fixed an issue with displaying product on the frontend when the product flat indexer is enabled
  * Fixed an issue with applying catalog price rules on the category level
  * Fixed an issue where the essential cookies like CUSTOMER, CART, and so on were not created in Google Chrome
  * Fixed an issue with placing orders by customers assigned to a VAT group
  * Fixed an issue with incorrect error message during registration, and inability for a shopper to ask for resending a confirmation email
  * Fixed an issue where the Catalog module resource Setup Upgrade logic was broken
* Modularity improvements:
  * Moved abstract Core models and related logic to the Magento/Model library
  * Moved the abstract DB logic and Core resource helpers to the Magento/DB library
  * Eliminated the Core\Model\App class
  * Moved the Magento Flag functionality to the library
  * Resolved dependency of the Catalog and related modules on the Review module
  * Moved indexers related logic from the Core module to the Indexer module
  * Moved the Inline translation and user intended translate functionality from the Core module to a separate Translation module
* Framework Improvements:
  * Covered Magento library components with unit tests:
     * Magento\Config
     * Magento\Convert
     * Magento\Controller
     * Magento\Data\Collection\Db
     * Magento\Mview
     * Magento\Url and Magento/Url.php
  * Covered Magento application components with unit tests:
     * Magento\Checkout\Model\Config
     * Magento\Checkout\Model\Observer
     * Magento\Checkout\Model\Type
     * Magento\Sales\Model\Config
  * Renamed LauncherInterface to AppInterface
* Improvements in code coverage calculation:
  * Updated the whitelist filter with library code for integration tests code coverage calculation
* GitHub requests:
  * [#512] (https://github.com/magento/magento2/issues/512) -- Theme Thumbnails not showing
  * [#520] (https://github.com/magento/magento2/pull/502) -- Corrected Search Engine Optimization i18n
  * [#519] (https://github.com/magento/magento2/issues/519) -- New Theme Activation
* Customer Service usage:
  * Refactored the Log module to use Customer Service
  * Refactored the RSS module to use Customer Service
  * Refactored the Review module to use Customer Service
  * Refactored the Catalog module to use Customer service layer
  * Refactored the Downloadable module to use Customer service layer

* Fixed bugs:
  * Fixed an issue where the schedule of recurring payments was not displayed in the shopping cart
  * Fixed an issue with displaying tax class names in the Customer Groups grid
  * Fixed an issue with testing Solr connection
  * Fixed an issue with using custom module front name
  * Fixed an issue with USPS and DHL usage in the production mode
* Modularity improvements:
  * Consolidated all logic related to Layered Navigation in one separate module
* Framework Improvements:
  * Covered Magento library components with unit tests:
     * Magento/Interception
     * Magento/ObjectManager
     * Magento/Message
     * Magento/Module
     * Magento/Mail
     * Magento/Object
     * Magento/Math
* Updated XML files to include a reference to the schema file in a form of a relative path
* Updated code to be PSR-2 compliant

* Themes update:
  * LESS styles library added in pub/lib/css/
  * A new Blank theme set as default
* GitHub requests:
  * [#491](https://github.com/magento/magento2/pull/491) -- Fixed bug, incorrect auto-generation Category URL for some groups of symbols (idish, cirrilic, , , and other).
  * [#480](https://github.com/magento/magento2/pull/480) -- Fixing a bug for loading config from local.xml
  * [#472](https://github.com/magento/magento2/issues/472) -- Params passed in pub/index.php being overwritten
  * [#461](https://github.com/magento/magento2/pull/461) -- Use translates for Quote\Address\Total\Shipping
  * [#235](https://github.com/magento/magento2/issues/235) -- Translation escaping
  * [#463](https://github.com/magento/magento2/pull/463) -- allow _resolveArguments to do sequential lookups
  * [#499](https://github.com/magento/magento2/issues/499) Deleted unclosed comment in calendar.css
* Fixed bugs:
  * Fixed a fatal error that occurred with a dependency in pub/errors/report.php
  * Fixed an issue where code coverage failed for Magento\SalesRule\Model\Rule\Action\Discount\CartFixedTest
  * Fixed an issue where PayPal Express Checkout redirected to the PayPal site even though the Allow Guest Checkout option was set to 'No'
  * Fixed an issue where invalid password reset link was sent when resetting customer password from the backend
  * Fixed an issue where it was not possible to download a previously created backup
  * Fixed a security issue with possibility of a XSS injection in the Integration re-authorization flow
  * Fixed an issue where Billing Agreement cancellation from the backend did not work
  * Fixed an issue with the debug section in the developer settings
  * Fixed the unreliable implementation of the fetching authorization header via SOAP
  * Fixed issues with WSDL generation error reporting
  * Fixed an issue with incorrect order of the Recurring Profile tab in Account Customer on the frontend
  * Fixed an issue when the information about a custom option of the 'File' type was not displayed correctly on the recurring profile page
  * Fixed an issue with editing Product template
  * Fixed an issue with duplicated shipping method options during checkout
  * Fixed an issue where flat indexers were re-indexed in shell when they were disabled
  * Fixed an issue where adding a wrong/nonexistent SKU using 'Order by SKU' from My Account caused a fatal error
  * Fixed an issue with the JS/CSS merging functionality
  * Fixed an issue with static view files publication tool used for the 'production' mode
* Modularity improvements:
  * Removed the deprecated GoogleCheckout functionality
  * Removed all dependencies on the RecurringPayment module
  * Removed the Sales module dependencies on Customer models/blocks
  * Renamed the RecurringProfile module to RecurringPayment
  * Resolved dependencies between the Email Templates functionality and other modules
  * Moved Core module lib-only depended components to library
  * Moved CSS URL resolving logic from publisher to the separate CSS pre-processor
  * Re-factored the View publisher
* Framework improvements:
  * Added restrictions on the data populated to the Service Data Object
  * Renamed Data Transfer Object to Service Data Object
  * Updated the view files population tool to support LESS
* Customer Service usage:
  * Refactored the Tax module to use Customer service layer
  * Refactored Customer module Adminhtml internal controllers and helper to use Customer services
  * Added and updated the Customer service APIs
  * Exposed Customer services as REST APIs
* Indexer implementation:
  * Implemented a new optimized Product Price Indexer
* Updated various PHPDoc with the parameter and return types

* Cache:
  * Implemented depersonalization of private content generation
  * Implemented content invalidation
  * Added Edge Side Includes (ESI) support
  * Added a built-in caching application
* GitHub requests:
  * [#454](https://github.com/magento/magento2/pull/454) -- Allow to specify list of IPs in a body on maintenance.flag which will be granted access even if the flag is on
  * [#204](https://github.com/magento/magento2/issues/204) -- Mage_ImportExport: Exporting configurable products ignores multiple configurable options
  * [#418](https://github.com/magento/magento2/issues/418) -- Echo vs print
  * [#419](https://github.com/magento/magento2/issues/419) -- Some translation keys are not correct.
  * [#244](https://github.com/magento/magento2/issues/244) -- Retrieve base host URL without path in error processor
  * [#411](https://github.com/magento/magento2/issues/411) -- Missed column 'payment_method' of table 'sales_flat_quote_address'
  * [#284](https://github.com/magento/magento2/pull/284) -- Fix for Issue #278 (Import -> Stores with large amount of Configurable Products)
* Fixed bugs:
  * Fixed an issue where Mage_Eav_Model_Entity_Type::fetchNewIncrementId() did not rollback on exception
  * Fixed an issue where a category containing more than 1000 products could not be saved
  * Fixed inappropriate error messages displayed during installation when required extensions were not installed
  * Fixed synopsis of the install.php script
  * Fixed an issue where the schedule of recurring payments was not displayed in the shopping cart
* Modularity improvements:
  * Introduced the OfflinePayments module - a saparate module for offline payment methods
  * Added the ability to enable/disable the Paypal module
  * Moved the framework part of the Locale functionality from the Core module to library
  * The Locale logic was split among appropriate classes in library, according to their responsibilities
  * Removed the deprecated DHL functionality
  * Introduced the OfflineShipping module for offline shipping carrier functionality: Flatrate, Tablerate, Freeshipping, Pickup
  * Introduced a separate module for the DHL shipping carrier
  * Introduced a separate module for the Fedex shipping carrier
  * Introduced a separate module for the UPS shipping carrier
  * Introduced a separate module for the USPS shipping carrier
* Framework Improvements:
  * Added the ability to intercept internal public calls
  * Added the ability to access public interface of the intercepted object
  * Added a static integrity test for plugin interface validation
  * Added support for both class addressing approaches in DI: with and without slash ("\") at the beginning of a class name
* Customer Service usage:
  * Refactored the Customer module blocks and controllers to use customer service layer
* Security:
  * Introduced the ability to hash a password with a random salt of default length (32 chars) by the encryption library
  * Utilized a random salt of default length for admin users, and frontend customers

* GitHub requests:
  * [#235](https://github.com/magento/magento2/issues/235) -- Translation escaping
  * [#463](https://github.com/magento/magento2/pull/463) -- allow _resolveArguments to do sequential lookups
* Fixed bugs:
  * Fixed an issue where nonexistent store views flat tables cleanuper dropped the catalog_category_flat_cl table
  * Fixed an issue where the Product Flat Data indexer used the helpers logic instead of the Flat State logic
  * Fixed an issue where an exception was thrown when applying a coupon code
  * Fixed an issue where a Shopping Cart Price Rule was applied to the wrong products
  * Fixed an issue with the broken Related Orders link on the Recurring Profile page
  * Fixed an issue with CMS pages preview not working
  * Fixed an issue with a sales report for a store view returning wrong result
  * Fixed an issue where shipping did not work for orders containing only bundle products
  * Fixed an issue where a custom not found page action did not work
  * Fixed an issue where user configuration for a shopping cart rule to stop further rules processing was ignored
* Modularity improvements:
  * Resolved dependencies of the Sales module on the RecurringProfile module
  * Resolved dependencies of the Email Templates functionality on application modules
  * Lib-only dependent components of the Core module moved to library
  * CSS URL resolving logic moved from the publisher to a separate CSS pre-processor
  * Refactored the View publisher
* Customer Service usage:
  * Refactored the Sales module to use Customer service layer
  * Refactored the Checkout module to use Customer service layer
* Updated various PHPDoc with the parameter and return types

* GitHub requests:
  * [#134] (https://github.com/magento/magento2/pull/134) Fixed a typo in "Vorarlberg" region of Austria (was Voralberg)
* Fixed bugs:
  * Fixed an issue with the "Add to Cart" button on the MAP popup of compound products
  * Fixed an issue where the "Add Address" button for Customer in Admin was broken
  * Fixed an issue where predefined data are not loaded for a newsletter when it is added to a queue
* Indexer implementation:
  * Implemented a new optimized Catalog Category Product Indexer
  * Implemented a new optimized Catalog Category Flat Indexer
  * Implemented a new optimized Catalog Product Flat Indexer
* Modularity improvements:
  * Moved all Configurable Product functionality to a newly created ConfigurableProduct module
  * Moved the Shortcut Buttons abstraction from PayPal to Catalog
  * Moved the Recurring profile functionality to a separate module
  * Moved the Billing Agreements functionality to the PayPal module
  * Finalized the work on resolving dependencies between the Multishipping module, and all other modules. Module can be removed without any impact on the system
* Customer Service usage:
 * Updated Customer Group Grid to use Customer Service for data retrieving and filtering
 * Updated CustomerMetadataService::getAttributeMetadata to throw an exception if invalid code is provided
* Unified the format of specifying arguments for class constructors in DI and in Layout configuration:
  * A common xsd schema is being used for defining simple types. Layout and DI customize common types with their specific ones
  * Argument processing is unified, and moved to library

* Fixed bugs:
  * Fixed inability to execute System Backup, Database Backup, and Media Backup
* Indexer implementation:
  * Implemented a new optimized Catalog Category Flat Indexer
* Cron improvements:
  * Added the ability to divide cron tasks into groups
  * Added the ability to run cron groups in separate processes
* Caching improvements:
  * Added a new mechanism to identify uniquely page content (hash-key for cache storage)
  * Added a tab for Page Cache mechanism in System Configuration
  * Implemented the ability to configure the Varnish caching server settings and download it as a .vcl file
* LESS pre-processing to CSS
  * LESS files in library, theme, module are automatically compiled to CSS during materialization
  * LESS files compilation caching mechanism added in Developer mode
* Modularity improvements:
  * Moved the Shortcut Buttons abstraction from PayPal to Catalog
  * Moved the Recurring Profile functionality to a separate module
  * Moved the Billing Agreements functionality to the PayPal module
* Improvements in code coverage calculation:
  * Added code coverage calculation in the clover xml format for unit tests
* GitHub requests:
 * [#377] (https://github.com/magento/magento2/issues/377) Remove and avoid javascript eval() calls
 * [#319] (https://github.com/magento/magento2/issues/319) No message was displayed when product added to shopping cart.
 * [#367] (https://github.com/magento/magento2/issues/367) Improve the error message from the contact form
 * [#469] (https://github.com/magento/magento2/issues/469) Can't change prices on different websites for custom options
* Updated the Customer service exception handling, and added tests
* Added usage of the Customer service to the Customer module, replacing some direct usage of the Customer model
* Updated various PHPDoc with the parameter and return types

* Modularity improvements:
  * Moved abstract shopping cart logic from the Paypal module to the Payments module
* Caching improvements:
  * Added a new mechanism to uniquely identify page content (a hash-key for cache storage)
  * Replaced the "magentoZoom" plugin with two widgets: the "gallery" and "zoom"
* Fixed bugs:
  * Fixed an issue with inserting an image in WYSIWYG editor where the selected folder was stored in session
  * Fixed an issue with CMS Page Links not being shown because of the empty text in the link
  * Fixed an issue where zooming functionality was not disabled for the responsive design
  * Fixed an issue with zooming on a configurable product page where the main product image was shown instead of the selected option images
* Updated various PHPDoc with parameter and return types
* Moved quote-related multishipping logic to the Multishipping module
* Resolved dependencies between the Payment and Multishipping modules
* Moved the framework part of the Translate functionality from modules to the library
* Created the architecture for the email template library
* Introduced a consistent approach for using the Config scope
* Fixed an issue with the dependency static test

* Modularity improvements:
  * Consolidated all PayPal-related logic in a separate module
  * Resolved dependencies on the Magento_GroupedProduct module
  * Added the ability to enable/disable/remove the Magento_GroupedProduct module without impact on the system
* Implemented the Oyejorge Less.php adapter
* Implemented the Less files importing mechanism
* Added the ability to configure certain cache frontend, and associate it to multiple cache types, thus avoiding the duplication of cache configuration
* Implemented the more strict format of array definition in the DI configuration:
  * Covered array definitions with XSD, and made the whole DI configuration validated with XSD
  * Added the ability to define arrays with keys containing invalid XML characters, that was impossible when keys were represented by the node names
* Fixed bugs:
  * Fixed an issue with missed image for a cron job for the abandoned cart emails
  * Restored the ability to configure cache storage in `local.xml`
  * Fixed an issue with the css\js merging functionality
  * Fixed an issue with customer selection on the order creation page
* AppInterface renamed to LauncherInterface
* Removed the reinit logic from the Config object
* Framework part of the "URL" functionality removed from modules
* Framework part of the "Config" functionality removed from modules
* Removed the deprecated EAV structure creation method from the EAV setup model
* Updated various PHPDoc with parameter and return types
* Indexer implementation:
  * Implemented a new indexer structure
* Refactored Web API Framework to support the Data Object based service interfaces
* Refactored controllers, blocks and templates of the Sales module to use Customer service
* GitHub requests:
  * [#275] (https://github.com/magento/magento2/issues/275) -- XSS Vulnerability in app/code/core/Mage/CatalogSearch/Block/Result.php
* Removed the outdated Customer service

* Modularity improvements:
  * Moved all Grouped Product functionality to newly created module GroupedProduct
  * Moved Multishipping functionality to newly created module Multishipping
  * Extracted Product duplication behavior from Product model to Product\Copier model
  * Replaced event "catalog_model_product_duplicate" with composite Product\Copier model
  * Replaced event "catalog_product_prepare_save" with controller product initialization helper that can be customozed via plugins
  * Consolidated Authorize.Net functionality in single module Authorizenet
  * Eliminated dependency of Sales module on Shipping and Usa modules
  * Eliminated dependency of Shipping module on Customer module
  * Improved accuracy and quality of Module Dependency Test
* Fixed bugs:
  * Fixed an issue when order was sent to PayPal in USD regardless of currency used during order creation
  * Fixed an issue with 404 error when clicking any button on a Recurring Billing Profile in the backend
  * Fixed an issue with synchronization with Google Shopping on product update caused by missed service property
  * Fixed ability to submit order in the backend when Authorize.Net Direct Post is used
  * Fixed an issue with notice that _attribute_set column is missing during Import/Export
* Removed the deprecated service-calls and data source functionality
* Request\Response workflow improvements:
  * Added Console\Response
  * Changed behavior of AppInterface to return ResponseInterface instead of sending it

* Introduced a new layout block attribute - cacheable
* Fixed bugs:
  * Fixed an issue with displaying configurable product images in shopping cart
  * Fixed an issue with Tax Summary not being displayed properly on the Order Review page
  * Optimized the Plushe theme CSS
  * Fixed attribute types for configurable product variations
  * Fixed an issue with incorrect link in the Reset Password email for customers registered on the non-default website
  * Fixed an issue with creating orders using DHL on holiday dates
  * Fixed product export
  * Fixed 3D secure validation
  * Fixed an issue with session being lost when a logged in user goes from store pages using secure URL to the store pages which do not use secure URL
  * Fixed an issue with price ranges in the Advanced search

* Fixed bugs:
  * Fixed an issue with exceeding the memory limit when uploading very big images
  * Fixed an issue in moving a category when $afterCategoryId is null
  * Fixed an issue when products from a non-default website were not available as bundle items
  * Fixed an issue when orders placed via Authorize.net had the wrong statuses
  * Fixed an issue where orders placed via PayPal Express Checkout could not be placed if HTTPS was used on the frontend
  * Fixed a security issue with a user session during registration
  * Removed a CSRF vulnerability in checkout
  * Fixed an issue with JavaScript static testing framework not handling corrupted paths in white/black lists properly
  * Fixed an issue with Google Shopping synchronization
  * Fixed the contextual help tooltip design
  * Fixed an issue with the Authorize.net CC section UI on the Onepage Checkout page
  * Fixed UI issues on the order pages in the backend
  * Fixed UI issues in the backend for IE9
  * Fixed UI issues on the Edit Customer page in the backend
  * Fixed a UI issue with the image preview placeholder on the Edit Product page for IE9
  * Fixed UI issues with forms in the backend
  * Fixed UI issues with buttons in the backend
  * Fixed an issue with a product status after a virtual product was duplicated
  * Fixed a fatal error with attribute file from the customer account page in the backend
  * Fixed a security issue when CURLOPT_SSL_VERIFYPEER and CURLOPT_SSL_VERIFYHOST where used with improper values sometimes
  * Updated the field descriptions for Secure Base URL settings in the backend
  * Fixed an issue in product duplication for multiple store views
  * Consolidated several 3rd-party JavaScript libraries in the pub/lib directory, and fixed license notice texts to conform to the open source license requirements
* Service Layer implementation:
  * Implemented the initial set of services for the Customer module

* Fixed bugs:
  * Fixed invalid year in exception log errors
  * Fixed the double-serialization in saving data for shipments
  * Fixed an issue with adding a gift wrapping for multiple items
  * Fixed shipping labels generation for DHL
  * Fixed an issue with lost product price and weight during import
  * Fixed a fatal error when a file reference is added to the HTML head
  * Fixed an issue with printing orders containing downloadable product(s)
  * Fixed an issue with the 'Same as shipping' check box not being selected on the Review Order page for PayPal Express checkout
  * Fixed an issue with Email Templates preview showing a blank page
  * Fixed an issue with a refund creation from the PayPal side
  * Removed the occurrences of the non-existing Mage_Catalog_Model_Resource_Convert resource model
  * Fixed an issue with a coupon usage after applying it with multiple addresses
  * Fixed the Abandoned Cart emails sending
  * Fixed an issue where users with "Reorder" permission could not perform reorder
  * Fixed an issue with adding items from wishlist to the Shopping Cart with quantity increments enabled
  * Fixed an issue with the catalog_url indexer incorrect rewrites history for categories
  * Fixed an issue in saving an integration with a duplicate name
  * Fixed an issue when a customer could see someone's else reviews on the private Account Dashboard
  * Fixed an issue when a "New Theme" page was displayed as broken when trying to create a theme with incorrect "Version" value
  * Fixed an issue in saving an integration with XSS injection in the required fields
  * Fixed an issue with the Mini Shopping Cart when it contained virtual product
  * Fixed an issue in disabling the Shopping Cart sidebar
  * Fixed an issue when the "Adminhtml" cookie was not set when a user logged in to the backend
  * Fixed an issue when the "Persistent_shopping_cart" cookie was not set after customer's login
  * Fixed inability to publish products to Google Shopping
  * Fixed inability to download or revert the backup
  * Fixed inability to create a customer account when placing an order with a downloadable product
* Various improvements:
  * Disabled PHP errors, notices and warnings output in the production mode, to prevent exposing sensitive information

* Fixed bugs:
  * Security improved for the Login, Update Cart, Add to Compare, Review, and Add entire wishlist actions on the frontend
  * Removed warnings on category pages when Flat Catalog Category is enabled
  * Fixed product price displayed in wrong currency after switching currency on the frontend
  * Fixed the Save & Duplicate action in product creation
  * Fixed big image scaling in product description
  * Fixed admin dashboard styling issue
  * Fixed validation message for the Quantity field on the product page in the backend
  * Fixed the email template for sharing a Wishlist
  * Fixed the response of the drop-down menu in the Plushe theme
  * Fixed the missing Related Banners tab for Catalog Price Rule
  * Fixed inability to enable the duplicated product
  * Removed warnings on saving payment method configuration
  * Fixed gift messages displaying on the Order View page after admin edits
  * Fixed inability to create a new order status
  * Fixed the behavior of the Save and Previous and the Previous buttons on the Edit Review page
  * Fixed inability to delete a website if the number of websites is less or equal to two
  * Fixed Export on the All Customers page
  * Fixed inability to add products to the Shopping Cart from the Category page in Internet Explorer
  * Fixed logo on the backend login page
  * Fixed visual elements to indicate that Tax details can be expanded on the order creation page in the backend
  * Fixed the CMS page preview design
  * Fixed the newsletter template preview design
  * Fixed the Matched Customers grid design in the Email Reminder Rules
  * Fixed the theme version validation message displayed when creating a new theme
  * Fixed performance degradation during installation wizard execution
  * Fixed cron shell script
  * Fixed user login on the frontend, when the Redirect Customer to Account Dashboard after Logging option is set to No
  * Fixed errors in requests to shipping carrier (DHL International) when the shipping address contains letters with diacritic marks
  * Fixed invalid account creation date
  * Fixed displaying Product Alert links on product view page when the functionality is disabled
  * Fixed the absence of some bundle options when configuring a bundle product in the Shopping Cart on the frontend
  * Fixed the issue which allowed to view and cancel billing agreements belonging to another customer
  * Fixed the content spoofing vulnerability when Solr was used
  * Fixed a potential XSS vulnerability in customer login
  * Fixed RSS feed for categories containing bundle product(s)
  * Fixed inability to place an order with 3D Secure in Internet Explorer 10
  * Fixed inability to place an order with PayPal Payflow Link and PayPal Payments Advanced
  * Fixed integrity constraint violation in catalog URL rewrites
  * Fixed the absence of the error when a wrong website code is specified during a website creation
  * Fixed saving in the backend a new customer address, which contains new customer address attributes configured to be not visible on frontend
  * Fixed USPS shipping method in the checkout
  * Fixed placing orders with recurring profile items via PayPal Express Checkout
  * Fixed email template creation in the backend
  * Fixed the issue with default billing address being used instead of default shipping address during admin order creation
  * Fixed inability to choose DB as Media Storage
  * Fixed PHP issues found during the UI testing of the backend
  * Fixed shipping label creation for USPS Priority Mail Shipping methods
  * Fixed the issue which allowed to create customers with duplicate email
  * Fixed the abstract product block error in the tier price template getter
  * Fixed system message displaying in the backend
  * Fixed the "404" error on customer review page
  * Fixed autocomplete enabled on the admin login page
  * Fixed the 3D Secure iframe
  * Fixed the indicators of mandatory fields on the Package Extension page
  * Fixed product image scaling on the Compare Products page
  * Fixed product page design for products with the Fixed Product Tax attribute
  * Removed spaces between parentheses and numbers in the Cart, Wishlist, and Compare Products blocks
  * Fixed the message displaying the quantity for products found on the Advanced Search page
  * Fixed incorrect caching of locale settings and URL settings during web installation
  * Fixed inability to use a newly created store for admin user roles
  * Fixed absence of the Advanced Search field on the frontend, when the Popular Search Terms functionality is disabled
  * Fixed incorrect link to downloadable product(s) in the email invoice copy
  * Fixed customs monetary value in labels/package info for international shipments
  * Fixed importing for files with blank URL Key field on the store view level
  * Fixed table rate error message
  * Fixed frontend login without pre-set cookies
  * Fixed date resetting to 1 Jan 1970 after saving a design change in the admin panel in case date format is DD/MM/YY
  * Fixed CAPTCHA on multi-address checkout flow
  * Fixed view files population tool
* GitHub requests:
  * [#122](https://github.com/magento/magento2/pull/122) -- Added support of federal units of Brazil with 27 states
  * [#184](https://github.com/magento/magento2/issues/184) -- Removed unused blocks and methods in Magento_Wishlist module
  * [#390](https://github.com/magento/magento2/pull/390) -- Support of alphanumeric order increment ids by the quote resource model
* Themes update:
  * Responsive design improvements
* Improvements in code coverage calculation:
  * Code coverage calculation approach for unit tests was changed from blacklist to whitelist

* Fixed bugs:
  * Fixed [MAP]: "Click for price" link is broken on the category page
  * Fixed tax rule search on the grid
  * Fixed redirect on dashboard if "Search", "Reset", "Export" buttons are clicked on several pages
  * Fixed switching user to alternate store-view when clicking on the Category (with Add Store Code to Urls="Yes" in the config)
  * Fixed printing Order/Shipping/Credit Memo from backend
  * Fixed 404 Error on attempt to print Shipping Label
  * Fixed duplication of JavaScript Resources in head on frontend
  * Fixed inconsistency with disabled states on Configurable product page in the Plushe theme
  * Fixed 3D Secure Information absence on Admin Order Info page
  * Fixed possibility to download or revert Backup
  * Fixed session fixation in user registration during checkout
  * Fixed fatal error during login to backend
  * Fixed inline translations in the Adminhtml area
  * Fixed partial refunds/invoices in Payflow Pro
  * Fixed the issue with ignoring area in design emulation
  * Fixed order placing with virtual product using Express Checkout
  * Fixed the error during order placement with Recurring profile payment
  * Fixed wrong redirect after customer registration during multishipping checkout
  * Fixed inability to crate shipping labels
  * Fixed inability to switch language, if the default language is English
  * Fixed an issue with incorrect XML appearing in cache after some actions on the frontend
  * Fixed product export
  * Fixed inability to configure memcache as session save handler
* GitHub requests:
  * [#406](https://github.com/magento/magento2/pull/406) -- Remove cast to (int) for the varch increment_id
  * [#425](https://github.com/magento/magento2/issues/425) -- Installation of dev53 fails
  * [#324](https://github.com/magento/magento2/pull/324) -- ImportExport: Easier debugging
* Modularity improvements:
  * Removed \Magento\App\Helper\HelperFactory
  * Removed the "helper" method from the abstract block interface
  * Layout page type config moved to library
  * Design loader moved to library
  * Theme label moved to library
  * Remaining part from Adminhtml moved to the appropriate modules. Adminhtml module has been eliminated
  * Core Session and Cookie models decomposed and moved to library
    * \Magento\Stdlib\Cookie library created
    * Session Manager and Session Config interfaces provided
    * Session save handler interface created
    * Session storage interface created, session does not extend \Magento\Object anymore
    * Session validator interface created
    * Session generic wrapper moved to library
    * Messages functionality moved from the Session model as separate component, message manager interface created
    * Sid resolver interface created to handle session sid from request

* Fixed bugs:
  * Fixed placing order with PayPal Payments Advanced and Payflow Link
  * Fixed losing previously assigned categories after saving the product with changed category selector field
  * Fixed losing of a newly created category assignment after variations generation during Configurable product or Gift Card creation
  * Fixed the error in order placement with Recurring profile payment
* GitHub requests:
  * [#299](https://github.com/magento/magento2/pull/299) -- Fix for issue Refactor Mage_Rating_Model_Resource_Rating_Collection
  * [#341](https://github.com/magento/magento2/pull/341) -- Replacing simple preg calls with less expensive alternates
* Modularity improvements:
  * Layout page type config moved to library
  * Design loader moved to library
  * Theme label moved to library
* Themes update:
  * Reduced amount of templates and layouts in magento_plushe theme
  * Responsive design improvements
* Integrity improvements:
  * Covered all Magento classes with argument sequence validator
  * Added arguments type duplication validator
* Implemented API Integration UX flows:
  * Ability to create and edit API Integrations
  * Ability to delete API integrations that were not created using configuration files
* Removed System REST menu item and all associated UX flows:
  * Users, Roles, and Webhook Subscriptions sub-menu items were removed
* Removed the Webhook module

* Modularity improvements:
  * Session configuration moved to library
  * FormKey logic was moved from Session
  * SessionIdFlags from Session was removed
  * Move Page logic to the Theme module and library
* Created integration module UX
* Created authorization service (Magento_Authz module)
* Fixed bugs:
  * Fixed the issue that prevented a customer group's shopping cart rules from applying properly to prices. The issue occurred when a customer was manually assigned to a customer group and automatic group assignment was enabled.
  * Fixed the bug with schema upgrade scripts not running after installation
  * Fixed the error with a blank page when user tries to get access to a restricted resource via URL (add Secret Key for URL set to "No")

* Modularity improvements:
  * Breakdown of the Adminhtml module:
     * Moved Newsletter, Report logic to the respective modules
     * Moved blocks, config, view, layout files of other components from Adminhtml folder to respective modules
  * Removed application dependencies from the library
* Move Magento\Core common blocks in the library
* Application areas rework:
  * Areas are independent from Store
  * Removed deprecated annotation from the getArea methods
* GitHub requests:
  * [#245](https://github.com/magento/magento2/pull/245) -- Resolve design flaws in core URL helper
  * [#247](https://github.com/magento/magento2/pull/247) -- Bug in Mage_Page_Block_Html_Header->getIsHomePage
  * [#259](https://github.com/magento/magento2/pull/259) -- Turkish Lira (TRY) is supported for Turkish members.
  * [#262](https://github.com/magento/magento2/pull/262) -- Update Rule.php
  * [#373](https://github.com/magento/magento2/pull/373) -- [Magento/Sales] Fixed typos
  * [#382](https://github.com/magento/magento2/pull/382) -- [Magento/Core] Fixed typos
  * [#304](https://github.com/magento/magento2/pull/304) -- Removed Erroneous closing "
  * [#323](https://github.com/magento/magento2/pull/323) -- InstanceController.php - made setBody protected
  * [#349](https://github.com/magento/magento2/pull/349) -- Move Mage_Catalog menu declaration into Mage_Catalog module.
  * [#265](https://github.com/magento/magento2/pull/265) -- Update Merge.php
  * [#271](https://github.com/magento/magento2/pull/271) -- Check Data should validate gallery information
  * [#305](https://github.com/magento/magento2/pull/305) -- Extra ", tidied up nested quotes
  * [#352](https://github.com/magento/magento2/pull/352) -- Add Croatia Country as part of European Union since 1st July 2013 for default european local countries in configuration
  * [#224](https://github.com/magento/magento2/pull/224) -- Tax formatting is locale aware and should not
  * [#338](https://github.com/magento/magento2/pull/338) -- Correcting SQL for required_options column
  * [#327](https://github.com/magento/magento2/pull/327) -- cart api bug fix & partial invoice credit memo divide by zero warning
* Themes update:
  * Old frontend (magento_demo) and backend (magento_basic) themes are removed
  * Updated templates and layout updates in the Bundle, Catalog, CatalogInventory, CatalogSearch, Downloadable, ProductAlert, Reports, Sendfriend modules
* Fixed bugs:
  * Fixed the error when  Magento cannot be reinstalled to the same database with table prefix
  * Fixed report Products in Cart
  * Fixed error on attempt to insert image to CMS pages under version control
  * Fixed order status grid so that you can assign state, edit, and view custom order status
  * Fixed Related Products Rule page so that category can be selected on conditions tab
  * Fixed Magento_Paypal_Controller_ExpressTest integration test so it is re-enabled
  * Fixed the bug with international DHL quotes

* Moved general action-related functionality to \Magento\App\Action\Action in the library. Removed Magento\Core\Controller\Varien\Action and related logic from the Magento_Core module
* Moved view-related methods from action interface to \Magento\App\ViewInterface with corresponding implementation
* Moved redirect creation logic from the action interface to \Magento\App\Response\RedirectInterface
* Moved Magento\Core common blocks to the library
* Added reading of etc/integration/config.xml and etc/integration/api.xml files for API Integrations
* Various improvements:
  * Email-related logic from the Core and Adminhtml modules consolidated in the new Email module
* GitHub requests:
  * [#238](https://github.com/magento/magento2/pull/238) -- Improve escaping HTML entities in URL
  * [#199](https://github.com/magento/magento2/pull/199) -- Replaced function calls to array_push with adding the elements directly
  * [#182](https://github.com/magento/magento2/pull/182) -- By default use collection _idFieldName for toOption* methods.
  * [#233](https://github.com/magento/magento2/pull/233) -- Google Rich Snippet Code
  * [#339](https://github.com/magento/magento2/pull/339) -- Correcting 'cahce' typo in documentation.
  * [#232](https://github.com/magento/magento2/pull/232) -- Update app/code/core/Mage/Checkout/controllers/CartController.php (fix issue #27632)
* Fixed bugs:
  * Fixed JavaScript error when printing orders from the frontend
  * Fixed Captcha problems on various forms when Captcha is enabled on the frontend
  * Fixed "Page not found" on category page if setting "Add Store Code to Urls" to "Yes" in the backend config
  * Fixed Fatal error when creating shipping label for returns

* Better Navigation menu rendering due to improved Caching of Categories
* Added Magento\Filesystem\Directory and Magento\Filesystem\File to the library
* Various improvements:
  * Added a static test to check for incorrect dependencies in the library
  * Moved Magento\Core\Model\Theme to the Magento\View component
  * Moved Magento\Core\Model\Design to the Magento\View component
  * Consistent declaration of page-types
  * The Framework part of the Cache functionality moved out from modules
* Themes update:
  * Updated templates and layout updates in the Captcha, Customer, Newsletter, Persistent, ProductAlert, Wishlist modules; old files moved to the "magento-backup" theme
  * Refactored and removed duplicate Persistent module templates
  * Plushe theme made responsive
* Fixed bugs:
  * Fixed inability to print order, invoice, or creditmemo in the frontend
  * Fixed fatal error caused by the Mage_Backend_Block_System_Config_FormTest integration test
  * Fixed the broken link when the MAP feature is enabled and actual product price is set to be displayed in the shopping cart
* Moved the following methods from Core Helpers to the appropriate libraries:
  * Moved the Data Helper date format related functions to \Magento\Core\Model\Locale
  * Moved the Data Helper array decoration related functions to Magento\Stdlib\ArrayUtils
  * Moved the Data Helper functions that copy data from one object to another to \Magento\Object\Copy

* Application areas rework:
    * Single point of access to the current area code
    * Declare Application Areas
* Various improvements:
  * Breakdown of the Adminhtml module:
     * Moved the Customer-related logic to the Customer module
     * Moved the System-related logic to the Backend module
     * Moved the Checkout-related logic to the Checkout module
     * Moved the Cms-related logic to the Cms module
     * Moved the Promotions-related logic to the CatalogRule and SalesRule modules
  * Eliminated the setNode/getNode methods from Magento\Core\Model\Config and adopted all client code
  * Moved all application bootstrapping behavior to library
  * Moved application-specific behavior from the entry points to the Magento\AppInterface implementations
  * Removed the obsolete behavior from routing and front-controller
  * Refactored the route configuration loading
  * Extracted the modularity support behavior to the Magento\Module component
  * Refactored the Resource configuration loading
  * Removed the obsolete configuration loaders
  * Removed the obsolete configuration from config.xml
  * Refactored the code-generation mechanism
  * Added constructor integrity verification to the Compiler tool
  * Added strict naming rules for the auto-generated Factory and Proxy classes
  * Global functions are now called from app\functions.php
  * Removed functions.php from the Magento\Core module
  * Methods related to mageCoreErrorHandler, string and date were moved from functions.php to the Library components
  * Moved the following methods from Core Helpers to the appropriate libraries:
     * Moved the Abstract Helper to the Magento\Escaper and Magento\Filter libraries
     * Moved the String Helper to the Magento\Filter, Magento\Stdlib\String, Magento\Stdlib\ArrayUtils libraries
     * Moved the Data Helper to the Magento\Math, Magento\Filter, Magento\Convert, Magento\Encryption, Magento\Filesystem libraries and to Magento\Customer\Helper\Data libraries
     * Moved the Http Magento Helper to the Magento\HTTP library
  * The Hint Magento Helper, Http Magento Helper helpers were removed from the Magento\Core module
  * Implemented SOAP faults declaration in WSDL
  * Web API config reader was refactored to use Magento\Config\Reader\Filesystem
  * Created integrations module. Added 'Integrations Grid' and 'New/Edit' Integration pages in the admin
  * Removed obsolete page fragment code
* Fixed bugs:
  * Fixed inability to create an Invoice/Shipment/Credit Memo if the Sales Archive functionality is enabled
  * Fixed the Minimum Advertised Price link on the Product view
  * Fixed the View Files Population Tool
  * Fixed the error on saving the Google AdWords configuration
  * Fixed the error with the 'Invalid website code requested:' message appearing when enabling payment methods
  * Fixed inability to insert spaces in credit card numbers
  * Fixed inability to print orders from the frontend
  * Fixed the fatal error on removal of reviews that have ratings
  * Fixed JS error with the browser not responding when Virtual/Downloadable product are added to cart
  * Fixed inability to delete a row from the 'Order By SKU' form in Internet Explorer
  * Fixed inability to enable the Use Flat Catalog Product option
  * Fixed inability to configure Grouped and Configurable products during order creation in the backend
  * Fixed inability to insert a widget and/or a banner in CMS pages
  * Fixed inability to set the Quantity value for Gift Cards
  * Fixed the fatal error on the Customer Account > Gift Registry tab in the backend
  * Fixed inability to import with the "Customers Main File" entity type selected
  * Fixed the "Recently Viewed/Compared products" option missing on the New Frontend App Instance page
  * Fixed the fatal error on managing Shopping Cart for a customer with a placed order in the backend
  * Fixed the fatal error on an attempt to create an RMA request for Configurable products
  * Fixed error on the backend dashboard if any value except "Last 24 Hours" is chosen in the "Select Range" dropdown
  * Fixed duplicate values of options in the drop-downs on the RMA pages in the backend

* Modularity improvements:
  * Cleavage of Adminhtml module
    * Moved Sales, Catalog, Tax-related logic to respective modules
    * Moved Action, Cache, Ajax, Dashboard, Index, Json, Rating, Sitemap, Survey, UrlRewrite from root of Adminhtml Controller folder
  * View abstraction was moved into library
  * Eliminated dependency in Magento\Data\Form from Magento\Core module
  * Eliminated Magento\Media module
* Themes update:
  * Templates and layout updates are updated in Cms, Contacts, Core, Directory, GoogleCheckout, Page, Payment, PaypalUk, Paypal, Rating, Review, Rss,Sales, Widget modules, old files moved to magento_backup theme
* Layout improvements:
  * Removed page type hierarchy and page fragment types
  * No direct code execution: methods addColumnRender, addRenderer, addToParentGroup usages as action nodes were eliminated
* Fixed bugs:
  * Impossible to add image using WYSIWYG
  * Legacy static test ObsoleteCodeTest::testPhpFiles produced false-positive results
  * Incorrect copyright information

* Various improvements:
  * Unified Area configuration
  * Moved EventManager to Magento\Event lib component
  * Moved FrontController, Routers, Base Actions to Magento\App
  * Created Magento\App component in library
  * Declared public interfaces for View component into library
  * Plushe theme is set as the default theme
  * Refactor the Blacklist Pattern in the Integrity Test Suite's ClassesTest to Replace Blacklist.php Files
  * Removed JavaScript unit test TreeSuggestTest.prototype.testBind as obsolete
  * Introduced ability to register a template engine to process template files having certain extension
  * Removed support of the Twig template engine along with the corresponding component from the library
  * Removed layout flag that forced template blocks to output rendered content directly to a browser bypassing the response object
  * Moved out responsibility of rendering template debugging hints from the template block to the plugin and decorator for a template engine
* Fixed bugs:
  * Fixed inability to create product if multiple attributes are assigned to attribute set
  * Fixed inability to create a new widget instance
  * Fixed error on Customers Segments Conditions tab while the 'Number of Orders' condition is chosen
  * Fixed blank page when placing order via Ogone
  * Fixed various UI issues in Admin Panel with layout, aligning, buttons and fields
  * Fixed static tests failing to verify themes files

* Various improvements:
  * Added static integrity test for compilation of DI definitions
  * Lightweight replacement for PhpUnit data providers is implemented and involved in static and integrity tests with big data providers (primarily file lists)
* Fixed bugs:
  * Fixed broken styles on front-end due to usage of nonexistent stylesheet
  * Fixed plugins configuration inheritance for proxy classes
  * Fixed OAuth consumer credentials expiry not being correctly calculated and added credentials HTTP post to the consumer endpoint
  * Fixed Namespace class references
  * Fixed error on creating shipment with bundle products
  * Fixed uninstallation via console installer
  * Fixed JavaScript error in bootstrap in IE8/9
  * Fixed placing order within PayPal Payments Advanced and Payflow Link
  * Fixed fatal error on placing order with Billing Agreement

* Various improvements:
  * Added static integrity test for compilation of DI definitions
  * Lightweight replacement for PhpUnit data providers is implemented and involved in static and integrity tests with big data providers (primarily file lists)
* Fixed bugs:
  * Fixed broken styles on front-end due to usage of nonexistent stylesheet
  * Fixed plugins configuration inheritance for proxy classes
  * Fixed OAuth consumer credentials expiry not being correctly calculated and added credentials HTTP post to the consumer endpoint
  * Fixed Namespace class references
  * Fixed error on creating shipment with bundle products
  * Fixed uninstallation via console installer
  * Fixed JavaScript error in bootstrap in IE8/9
  * Fixed placing order within PayPal Payments Advanced and Payflow link
  * Fixed fatal error on placing order with Billing Agreement

* Fixed bugs:
  * Fixed compilation of DI definitions
  * Fixed direct injection of auto-generated proxy classes
  * Fixed usages of auto-generated factories on the library level
  * Fixed fatal error after saving customer address with VAT number
  * Fixed fatal error caused by USPS shipping method with debug
  * Fixed url to Tax Class controller
  * Fixed incorrect subtotal displayed on the Order page
  * Fixed incorrect arguments for shipping xml elements factory
  * Fixed theme editing in developer mode (PHP 5.4)
  * Fixed absent conditions during New Shopping Cart Price Rule creation
  * Fixed fatal error while try to edit created configurable product while Dev Mode enabled (PHP 5.4)
  * Fixed frontend error when persistent shopping cart functionality is enabled
  * Fixed Tax tab
  * Fixed broken link "Orders and returns" on frontend
  * Fixed placing order within OnePageCheckout using online payment methods
  * Fixed error when product is being added to order from backend if Gift Messages are enabled
  * Fixed error when product is being added to cart if MAP is enabled
  * Fixed error when product attribute template is being edited
  * Fixed error when setting configuration for Google API
  * Fixed backend issue when Stores>Configuration>System>Advanced page was not displayed and did not allow to save changes
  * Fixed not executable button "Continue shopping" on Multi-shipping process
  * Fixed error on adding product to shopping cart from cross-sells block
  * Fixed fatal error on Recurring Billing Profiles page
  * Fixed error on setting configuration for Catalog
  * Fixed error on placing order with Configurable product
  * Fixed issue with downloadable product creation
  * Fixed error on update configuration for payment methods
  * Fixed blank page on shopping cart if FedEx shipping method is enabled
  * Fixed fatal error when SID presents in URL
  * Fixed absence of selection of a role assigned to an admin user

* Translation mechanism improvements:
  * Translate function ->__() was removed from Magento model interfaces. Global function __() was created
  * Added I18n tools for translation dictionary generation and language package generation
* Configuration improvements:
  * Implemented Magento Config component that allows to create new configuration types in a simple way
  * Improved default/store/website configuration
     * config.xml file is designed to store only default/store/website configuration data
     * concrete store/website configuration is loaded on demand
  * Improved Install, Category, Product, EAV, Customer, Wishlist, PDF, VDE, Currency, Email Template, Crontab, Events, Routes, Modules, Locale, Import/Export, Indexer, Resources configuration segments:
     * Configuration moved to separate files. Some parts are transformed to DI configuration and moved to `di.xml` files
     * New configuration files are validated with XSD
     * Format of the configuration changed to make possible its validation
  * Improved configuration in `widget.xml`, `fieldset.xml`, `persistent.xml` and `install.xml` files:
     * `install.xml` was renamed to `install_wizard.xml`
     * The configuration is validated with XSD
     * Format of the configuration changed to make possible its validation
     * Some parts are transformed to DI configuration and moved to `di.xml` files
  * Removed `jstranslate.xml` files and moved all message definitions to `Magento_Core_Helper_Js`.
  * List of non-structured nodes from config.xml were transformed into DI configuration
* JavaScript improvements:
  * Prototype.js usages converted to jQuery:
     * Deprecated prototype.js based method removed from app/code/Magento/Weee/view/frontend/tax-toggle.js
     * Removed deprecated prototype.js based file: app/code/Magento/Checkout/view/frontend/opcheckout.js
     * Updated to use jQuery redirectUrl widget vs prototype based solution:
       * app/code/Magento/Oauth/view/adminhtml/authorize/form/login.phtml
       * app/code/Magento/Oauth/view/frontend/authorize/form/login.phtml
       * app/code/Magento/Catalog/view/frontend/product/list.phtml
  * Removed file containing jQuery that did not meet the Magento 2 coding standard. Replaced with redirect-url widget
     * app/code/Magento/Catalog/view/frontend/js/mage-attributes-processing.js
  * Updated to meet Magento 2 coding standard: app/code/Magento/Checkout/view/frontend/cart/item/default.phtml
  * Added jQuery widgets:
    * mage.deletableItem - Widget to tag DOM element as deletable, by default on click
    * mage.fieldsetControls & mage.fieldsetResetControl - Widget to easily reset a subset of form fields with a reset ui control
    * mage.itemTable  - Widget to easily add a data template block dynamically on an event, by default click.
    * mage.redirectUrl - Simple widget to allow for consistent javascript based redirects that meet the Magento 2 coding standard
    * Added new validation rules for validation widget: 'required-if-not-specified', 'required-if-specified', and 'validate-item-quantity'
* Various improvements:
  * Changed VendorName from Mage to Magento
  * Implemented PSR-0 and PSR-1 Coding Standards
    * All Magento source code has been converted.
    * Tests have been written to enforce PSR-0 and PSR-1 coding standards.
  * Removed empty module setup models. Core resource setup model is used as a default setup model now. Custom setup model must be injected via DI configuration
  * Removed some events (plugins must be used instead):
    * adminhtml_widget_container_html_before
    * admin_session_user_logout
    * model_config_data_save_before
    * admin_system_config_section_save_after
    * backend_menu_load_after
    * catalog_controller_category_init_before
    * catalog_helper_output_construct
    * catalog_controller_product_init
    * catalog_category_tree_move_before
    * catalog_category_tree_move_after
    * catalog_product_website_update_before
    * catalog_product_website_update
    * catalog_product_media_save_before
    * catalog_product_media_add_image
    * catalog_product_type_grouped_price
    * catalog_product_collection_load_before
    * catalogsearch_index_process_start
    * catalogsearch_index_process_complete
    * cms_page_get_available_statuses
    * cms_wysiwyg_config_prepare
    * application_clean_cache
    * theme_copy_after
    * customer_registration_is_allowed
    * log_log_clean_before
    * log_log_clean_after
    * sales_convert_quote_payment_to_order_payment
    * sales_convert_quote_item_to_order_item
    * sales_quote_config_get_product_attributes
  * Removed the Poll module including references and dependencies to/on it.
* Redesign and reimplementation of web services framework
  * Removed the Api module and all existing SOAP V1, SOAP V2, and XML-RPC web services code
  * Implemented new web services framework to support both REST and SOAP based off of a common service interface
  * Implemented a 2-legged OAuth 1.0a based authentication mechanism for both REST and SOAP API calls
* Layout improvements:
  * Arbitrary handle name moved to handle node, id attribute
  * New arguments format, which introduce argument types implemented
  * Translation specified just on the level of node which is going to be translated
  * XSD validation for Layouts XML added
  * Referential integrity check with XSD introduced
  * Added ability to update containers via references
  * Type casting for all kind of types (url, option, array and simple types) added
  * Covered introduced argument types with integrity test
  * Types restrictions was implemented
  * Removed access to direct execution of API through layout by removing <action> nodes
  * Implemented ability to declare containers in layout that don't have any specific semantic value
  * Removed handle declaration from layout update files. Name of the file stands for the handle ID and handle's attributes are defined in the root <layout> node
* PHP 5.4 and 5.5 support:
  * Made application compatible with PHP 5.4 and 5.5
  * Removed workarounds for older PHP versions
  * Minimum supported PHP version is set to 5.4.0
* God Class Mage Eliminated
* Fixed bugs:
  * Fixed address field "State/Province" on frontend, which contained "[object Object]" items instead of necessary values
  * Fixed overriding/extending of global plugin configuration in area specific configuration

* Product management improvements:
  * Added ability to create variation on the Product creation page
  * Added ability to add attributes on the Product creation page. Attribute values also can be added directly from the Product creation page
  * Removed "Delete" button from the Product Edit page. Products can be deleted from Products Grid only
  * Enhanced Product Edit page
  * Improved visual styles and business logic for new category creation from product creation page
  * Updated button names for Grouped and Bundle products, added an ability to translate them
  * Changed design of all popup windows on product creation page
  * Simplified UI to add an attribute: made less fields there by default, restructured element positions, hidden rarely-used controls
  * Created a popup to select image for product variations
* JavaScript improvements:
  * Eliminated `json2.js` library since JSON parsing is bundled in all supported browsers
  * `Ajax.Autocompleter` is replaced with jQuery suggest widget for search in backend
  * `jsTree` jQuery plugin is utilized for User Roles, Api Roles, CMS Pages and URL Rewrites management pages in backend
  * Improved jQuery validation for credit cards
  * Added support of `$.mage.component` in some frontend themes
  * Further refactoring of JavaScript to use JQuery library:
     * Scripts are converted in the following modules and components: Centinel, Authorize.net, Payflow Link, Payflow Pro, Paygate, Paypal Express, Checkout, Captcha
     * Refactored Prototype-based implementation of validation in "New Category" dialog to use jQuery
     * Removing Prototype inclusion in several places
  * Enhanced menu behavior in backend
* VDE improvements:
  * Implemented inline translate tool for VDE
     * Added new dedicated button "T" in interface
     * 3 different modes: Page Text, Variable Text (for script texts), Alternative Text (for attributes)
     * Independent enabling of inline translation on frontend and in VDE
  * Modified some text messages in VDE and in themes management
  * Added ability to upload, browse and delete images and fonts that can be used in custom CSS
  * Added ability to duplicate a theme
  * Added ability to revert theme modifications to a last saved checkpoint
  * Improved theme's background image handling
  * Added alert, when deleting a block
  * Removed drag-n-drop feature
  * Refined and streamlined interface
* HTML improvements:
  * Enhanced accessibility in admin by labeling form fields
* Payment improvements:
  * Incorporated changes to the PayPal UI configuration from CE 1.7.0.1
     * Moved PayPal configuration to the Payment Methods menu section
     * Set the default value of the cUrl `VERIFYPEER` option to `true` for PayPal and added the ability to change this value
     * Changed the design and position of the configuration field tooltips
  * Removed support of Moneybookers payment method and underlying module in favor of 3rd party extensions
  * Implemented support of PayPal IPN protocol HTTP 1.1
  * Implemented a single place to configure credentials for Payflow Link and Express Checkout
* System Configuration improvements:
  * Added the functionality for creating nested field sets
  * Implemented the support for the extended and shared configuration fields
  * Added the ability to define dependencies between fields from different field sets
* `Varien_Image` library refactored:
  * Created adapters factory instead of class `Varien_Image_Adapter`
  * Refactored ImageMagick and GD adapters to make them testable
  * Added feature of generating image from text
* Support of Google services:
  * Changed module `Mage_GoogleOptimizer` to support Google Content Experiment instead of Google Optimizer
  * Implemented support of Google AdWords on the checkout success page
* DI improvements:
  * Added ability to configure DI for individual class instances
  * Added ability to pass differently configured instances to different parts of the system
  * Refactored proxy and factory generation mechanism
* Layout improvements:
  * Implemented all-new mechanism of layout merging and customization:
     * Convention over configuration approach is used, i.e. there is no need to declare layout files in module configs anymore
     * Added support for merged modular layout files in a theme instead of single `local.xml` theme file
     * All theme `local.xml` files are broken down and moved to theme modular layout files
     * All the layout files are broken into smaller ones - one layout handle per one file, so that code duplication cane reduced, when overriding layout files in themes
     * Covered new layout customization mechanism with integrity tests
  * Relocated several files, declared in layouts
  * Streamlined several design customizations
* Various improvements:
  * Refactored fallback paths to prevent searching of modular view files in non-module context, covered application with appropriate integrity test
  * Added configuration for limits on sending wishlist emails
  * Refactored default theme fixture in integration tests in order to divide it into smaller and easier to understand fixtures
  * Moved Currency Symbol module files from Adminhtml module to the module itself
  * "Contact Us" page is available through HTTPS only
  * Language selector for backend interface removed from footer. Language can be chosen on My Account page or on backend user edit page
  * Updated page titles in backend
  * Improved mechanism of notification and system messages in backend. All related blocks and controllers are moved to AdminNotification module. Enhanced visual representations of notifications: bubble for unread messages, popup for notifications and their descriptions
  * Updated text of some system messages, backend interface messages, backend menu items
  * Several classes are refactored to use Event Manager instead of `Mage::dispatchEvent()`
  * Improved test coverage of entry point classes
  * Improved authorization logic to be reusable with minimal configuration changes
  * Introduced App Area in Integration Testing Framework
  * Improved media entry point
  * Added plugins/interceptors support for easier extensibility of Magento functionality
  * Added `application_process_reinit_config` event, so that it is possible to react, when Magento config gets reinitialized
  * Added "less" to a list of files that are not published to the public directory during deployment process
  * Eliminated requirement of write access to `pub/static` directory in "production" mode. "Developer" and "default" modes still require write access to this directory
  * Improved test coverage of recently introduced `Mage_Core_Model_Config_` classes
  * Added proper description to the error message, shown when uploading too big file with a content to import
  * Refactored `Mage_Core_Model_Design_Package` - broken it down into several smaller classes according to the sets of responsibilities
  * Refactored Theme and Theme Service models to follow best practices of OOP design
  * Removed legacy API tests
  * Improved transparency of cache control by tag scope in the framework
  * Improved verification process for the application directories write-access by moving it to the top-level of framework initialization
  * Introduced separate configurable application directory to be used for merged Javascript files
  * Implemented support for minification of Javascript files; JSMin library adapter is created
  * Implemented explicit usage of cache type in collections; engaged it for website, store and store view collections; added tests for a number of collections
  * Implemented explicit usage of cache types in translations
  * Implemented explicit usage of cache types in layouts
  * Removed ability to set limits on maximal amount of categories, products, websites, stores, store views and admin users as an unusable feature
  * Improved and simplified path normalization methods in `Magento_Filesystem` component
  * Implemented proper exceptions instead of PHP warnings in `Magento_Filesystem` component
  * Introduced `Mage_Core_Model_ModuleManager` to provide "enabled" information about modules
  * Enabled following cache types in integration tests to improve performance: configuration, layouts, translations, EAV
  * Improved and refreshed design for backend
  * Removed "demo_blue", "iphone" and "modern" themes
  * Converted more backend grids from PHP implementation to layout declarations
  * Refactored experimental implementation of Service Calls Framework
     * All code from to `lib/Magento/Datasource` and `app/code/Mage/Core/Datasource` moved to `app/code/Mage/Core/DataService`
     * Added service calls support in Layout model
     * Fixed bugs and architectural flaws
     * Changed service calls declaration
     * Improved test coverage
     * Introduced mechanism to retrieve values from nested arrays by path
     * Added Invoker class to invoke service calls by given name
     * Added ability to define system configuration options via service calls. Refactored implementation for select field in XML
  * Refactored support of Twig templates
     * Removed experimental implementation of product view page with Twig templates
     * Template abstraction moved to separate module `Mage_Core_Model_TemplateEngine`
     * Modified various blocks and templates due to inability to call protected methods from templates
     * Improved test coverage
  * Refactored support for webhooks
     * Code that provides communication with outbound endpoint moved to library `Magento_Outbound`
     * Code that provides implementation of publish-subscribe mechanism and instruments moved to library `Magento_PubSub`
     * Removed experimental webhook implementation in client code
     * Used WebApi mechanism to provide authorization
     * Improved UI for working with webhooks in Magento backend
     * Improved test coverage
  * Removed support of callbacks from the framework
* GitHub requests:
  * [#71](https://github.com/magento/magento2/pull/71) -- Add event prefix for Cms blocks
  * [#108](https://github.com/magento/magento2/pull/108) -- Fix issue with `PHP_VERSION` on Ubuntu servers
  * [#110](https://github.com/magento/magento2/pull/110) -- Fixes `Varien_Io_Sftp::write`, `Varien_Db_Adapter_Pdo_Mysql::insertOnDuplicate`
  * [#123](https://github.com/magento/magento2/pull/123) -- Performance problem & memory leak in `Mage_Index_Model_Process`
  * [#125](https://github.com/magento/magento2/pull/125) -- Ability to disable triggering controller action
  * [#148](https://github.com/magento/magento2/pull/148) -- Fixed readability
  * [#156](https://github.com/magento/magento2/pull/156) -- Event `adminhtml_cms_page_edit_tab_content_prepare_form` and `$form->setValues($model->getData());` in wrong order
  * [#161](https://github.com/magento/magento2/pull/161) -- FIXED `http://www.magentocommerce.com/bug-tracking/issue/?issue=7419`
  * [#176](https://github.com/magento/magento2/pull/176) -- Add print/log query flags to collection
  * [#202](https://github.com/magento/magento2/pull/202) -- Installer fails to detect `InnoDB` on `MySQL 5.6+`
  * [#215](https://github.com/magento/magento2/pull/215) -- There is no sort-order "best value"
  * [#217](https://github.com/magento/magento2/pull/217) -- Update `app/code/core/Mage/Adminhtml/locale/de_DE/Mage_Adminhtml.csv`
  * [#243](https://github.com/magento/magento2/pull/243) -- Fix helper for determining system memory usage on Windows (pull request for issue #237)
  * [#267](https://github.com/magento/magento2/pull/267) -- Issue with camel case in cusutom defined source models
* Bug fixes:
  * Fixed absence of a product for store view created after the product
  * Fixed incorrectly displayed or absent product image on configurable product pages
  * Fixed incorrectly displayed Tier Price message for Bundle product in backend
  * Fixed absence of configured options, when composite product is edited from wishlist
  * Fixed inability to set product rating from backend
  * Fixed bug with adding product with decimal quantity
  * Fixed bug with incorrect theme saving when wrong preview file is uploaded
  * Fixed incorrectly displayed error message when unsupported JavaScript file is uploaded while editing a theme
  * Fixed bug with incorrect price and stock availability information
  * Fixed absence of "Delete" button on Widget Instance and Edit Custom Variable pages
  * Fixed inability to change PayPal configuration
  * Fixed inventory return after cancelling order, paid with PayPal Website Payment Standard method
  * Fixed removal of all the items from shopping cart, when cancelling payment by PayPal Website Payment Standard method
  * Fixed issue with customer address saved in `sales_flat_quote_address` table as `null` or as default address instead of new one during checkout
  * Fixed hard dependency on GD extension during installation. Now the application can be installed if any of GD or ImageMagick extension is enabled
  * Fixed handling of creation a customer with already existing e-mail in backend
  * Fixed exception on customer edit page, when profiler is enabled
  * Fixed removal of "NOT LOGGED IN" customer group, when attempting to delete nonexistent group
  * Fixed absence of a welcome email for a new customer that is created in backend
  * Added validation of customer DOB
  * Fixed bugs related to "Add Store Code to Urls" configuration setting: the setting applied to backend and produced exceptions on frontend
  * Fixed inability to edit Newsletter Template
  * Fixed inability to preview Newsletter Template while creating it
  * Fixed inability to save Configuration from "Web" tab
  * Fixed incorrect roles assignment for backend users
  * Fixed incorrect message during checkout via Authorize.Net
  * Fixed inability to create order in backend with Authorize.Net as payment method
  * Fixed unexpected alert during one-page checkout
  * Fixed bug with broken RSS link on some pages
  * Fixed inability to delete non-empty customer groups
  * Fixed bug with absent tracking number in notification email
  * Fixed JS bug in bundle products
  * Fixed bug with missing product configuration in bundle products
  * Fixed absence of a summary for a configured bundle product on Product View page
  * Fixed bug with missing wishlist grid on customer configuration page
  * Added validation for the "Weight" field in Product Create/Modify admin form
  * Fixed infinite loop in reports, when one of the GET-parameters was not submitted
  * Fixed integration test that failed at the midnight
  * Fixed image placeholder, being displayed instead of Base image, in Product View page
  * Fixed multiple bugs in IE 8 and 9
  * Restored export for table rates
  * Fixed weight calculation for DHL
  * Fixed anchor categories, which didn't show products from child categories
  * Fixed exception, when applying catalog price rules
  * Disabled "State" dropdown for Tax Rates in countries, where there are no states
  * Fixed inability to save a CMS page
  * Fixed Javascript calendar in backend Customer grid
  * Fixed issues with fields validation on order management page
  * Fixed taxes on Bundle product page
  * Fixed "Rating isn't available" message on Edit Review page
  * Fixed lack of data in New Order emails, when order is composed at backend
  * Fixed exception message, when importing wrong tax rates file
  * Fixed editable multiselect control - new value was not shown there, when added
  * Fixed exception, when saving a configurable product without associated products
  * Fixed inability to properly save system configuration, when submitting files there
  * Fixed performance issue with excessive generation of category menu on "Add to Cart" page
  * Fixed amounts, being shown in a wrong currency, when viewing created order
  * Fixed calculation for amount of items, remaining in an order, after shipping and invoicing
  * Fixed wrong price, calculated, when ordering multiple bundle products in backend
  * Fixed issues with changing order statuses in backend
  * Tested backend design, fixed the discovered issues - general and browser-related bugs
  * Fixed order items, that have been shipped with Free Shipping method, to have "free shipping" status
  * Fixed issue with a State field being required in countries, where it is not mandatory
  * Fixed inability to upload a file via File custom option, when ordering a product at frontend
  * Fixed incorrect cron timezone settings
  * Fixed performance issues with product saving in case of concurrent search requests
  * Fixed bug in migration script
  * Fixed incorrect email when "Send auto-generated password" was hit
  * Fixed bug with missing category image
  * Fixed incorrect handling of `GET` parameter `isAjax` after session expiration
  * Fixed incorrect translation of "month" field for customer's birthday
  * Fixed Google Analytics script inclusion
  * Fixed bug with excessive custom rewrites after reindex
  * Fixed performance tests failure on login page
  * Fixed incorrect value for average rating on Edit Review page
  * Fixed bug with incorrect module configuration overriding
  * Fixed exception in Nominal Tax model
  * Fixed bug in sitemap URL used in `robots.txt`
  * Fixed bug with incorrect `custom_design` field value during export
  * Fixed bug with incorrect RSS title
  * Fixed CSS style for validation message in CMS widgets
  * Fixed bugs in `Mage_Tag` module on product creation page
  * Fixed incorrect Products In Cart report
  * Fixed incorrect price for bundles with default quantity more than 1
  * Fixed displaying of "Import Behavior" section in the `System -> Import` page
  * Fixed exception, when importing a CSV file with Byte Order Mark
  * Removed remains of code pools in JavaScript tests
  * Fixed bugs in shipping label creation
  * Fixed inability to save some sections of configuration
  * Fixed bug with empty "New Shipment" e-mail
  * Fixed inability to save Attribute Set in IE8
  * Fixed wrong tax summary for partial invoices and credit memos
  * Fixed bug with categories custom design, where the chosen theme was not applied
  * Fixed empty list of themes in CMS pages and Frontend Apps backend sections
  * Fixed fatal error, when trying to access a customer account in a non-installed Magento
  * Fixed Javascript error, when accessing system Design configuration in Chrome
  * Fixed wrong representation of a widget on frontend, after hiding and showing WYSIWYG editor during CMS page modification
  * Fixed exception, when using 2-level cache backend
  * Fixed random test failures in `Mage_CatalogSearch_Block_Advanced_ResultTest`
  * Fixed duplication of a view file signature, e.g. "file.ext?mtime?mtime"
  * Prevented tracking of merged Javascript files metadata (and re-merging them) in production mode
  * Fixed incorrect memory usage calculation in Integration tests
  * Fixed issues in performance test scenarios
  * Fixed inability to delete customer's address on frontend
  * Fixed incorrect "No file chosen" message, shown after a successful upload of product image placeholder in Chrome
  * Made "Print Order" page to display theme-customized logo instead of a default one
  * Fixed other bugs in management of categories, products, product attributes, product templates (attribute sets), customers, taxes and tax rules
  * Product creation fixes:
     * Fixed inability to search and select category in IE8, including via mouse
     * Fixed usability of category search tree field to not hang after entering each symbol
     * Fixed inability to select/change attribute for product variations (configurable product) in IE8
     * Fixed field highlighting and error placement after validation on "Create Category" dialog
     * Fixed validation of parent category to be a require field
     * Fixed bug with displaying special price for a product on frontend after the product template is switched to one without special price
     * Fixed incorrectly displayed regular price for products with catalog price rule applied
     * Fixed inability to upload an image in the WYSIWYG editor
     * Fixed Javascript error, when replacing variation image in IE
     * Fixed Javascript errors in production mode
     * Unified look of all the popups
     * Removed "Add Attribute" link, when Product Details section is collapsed
     * Fixed issue with product template selector menu, which was not shown
  * Shopping Cart Price Rule fixes:
     * Fixed inability to save Shopping Cart Price Rule with Coupon = "No Coupon"
     * Fixed saving of Shopping Cart Price Rule having specific coupon
     * Fixed absence of fields on rule information tab
  * Payment fixes:
     * Fixed PayPal Pro (formerly Website Payment Pro) to pass shipping address in request to PayPal service
     * Fixed triggering of a credit memo creation when Charge Back notification comes from PayPal
     * Fixed emptying shopping cart after canceling on PayPal page
     * Fixed error "10431-Item amount is invalid." when a Shopping Cart Price Rule is applied in Express Checkout Payflow Edition
     * Fixed PayPal Payments Pro Hosted Solution to send "City" in place of the "State" parameter for UK and CA, if Region/State is disabled in the configuration
     * Fixed ability to invoice order without providing payment using Google Checkout API
     * Fixed validation of a Discover card number
     * Fixed issues in configuration for payment methods: absence of "Sort Order" field, excessive fields with class name as a value, issues with form elements and groups
     * Fixed exception, when using 2-level cache backend
     * Fixed inability to place order with PayPal Payments Advanced and Payflow Link payment methods
  * VDE fixes:
     * Removed full file path information from the title of an uploaded store logo
     * Fixed bugs in VDE with color picker, file uploader, themes assigning, Remove and Update buttons for custom CSS
     * Fixed hint for the Scripts palette in dock
     * Fixed inability to upload more than one Javascript file
     * Fixed bug with improper scaling images in UI
     * Fixed inability to preview and edit a physical theme
     * Fixed inability to delete a block
     * Fixed inability to delete a background image
     * Fixed preview of a virtual theme in production mode
     * Fixed JavaScript tests
     * Fixed bugs with inline translation
     * Added validation to the theme name field
     * Fixed absence of error message in IE, when uploading unsupported file type in Theme Javascript
     * Fixed corrupting of a `custom.css` file, when saving Custom CSS text
     * Fixed wrong design of "Chain" and "Reset to Original" image buttons
     * Fixed color picker, being cut off by small browser window
     * Fixed bottom indent in "Quick Styles" panel - it was too big
     * Fixed corrupted layout of "Image Sizing" tab, when resizing browser window
     * Fixed "We found no files", being displayed all the time in the form to upload theme Javascript files
  * API fixes:
     * Added missing fields to SOAP API
     * Fixed inability to set default customer address
     * Fixed error message, when saving a customer with wrong email address
     * Fixed inability to create partial order shipment
     * Fixed absence of special price information in return of `productGetSpecialPrice` method
     * Fixed incorrect content length of server response
     * Fixed absence of `productAttributeAddOption`, `catalogProductAttributeUpdate`, `catalogProductAttributeTypes`, `catalogProductAttributeRemoveOption` and `catalogProductAttributeInfo` methods with WS-I mode enabled
     * Fixed absence of `catalogProductDownloadableLinkList` method
     * Fixed bug with incorrect credit memo creation when order item id is set
     * Fixed bug with inability to update stock status or price of multiple products in one call
     * Fixed `shoppingCartOrderWithPaymentRequestParam` method description in WSDL
     * Fixed inability to add comment to order without changing order status
     * Fixed incorrect redirect after SOAP POST request
     * Fixed inability to end session by `endSession` method
     * Fixed Save button for Web Services User Roles in backend
     * Fixed memory issue due to incorrect filtering for the single field in `salesOrderList` method
     * Fixed bug with getting product information by numeric SKU
     * Fixed inability to add configurable product by `cart_product.add` method
     * Fixed ACL initialization in WebApi
     * Fixed bug with the same cache key used for both WS-I and non WS-I WSDL files
     * Fixed bug with updating shopping cart by `shoppingCartProductUpdate` method
     * Fixed product id validation in `shoppingCartProductAdd` method
     * Fixed absence of tracking number in `salesOrderShipmentInfo` method response
     * Fixed absence of tracking number in shipment transactional email

* Product creating & editing:
  * Added ability to control base text styling without WYSIWYG when editing description fields
  * Added validation for price and quantity fields
  * Removed category suggest limit
* Product template management:
  * Automatically update Product Template when modifying structure in Create Product flow
  * Improvements to change attribute set functionality
* Refactored JavaScript to use JQuery library:
  * Refactored the following pages: catalog tags, one page checkout, multishipping checkout, gift options, gift messages (across the board)
  * Converted jQuery popupwindow.js plugin to a jQuery widget
  * Replaced Prototype code for Switch/Maestro and Solo credit card with jQuery widget
  * Replaced Prototype Validation with jQuery validation plugin
  * Converted credit card payment tool tip to jQuery in all themes
  * Removed legacy JS files from all themes
* Various improvements in look & feel of backend UI:
  * Styling of components: catalog, sales, customers, reports, CMS, newsletter
  * Generic styling: grids, popup windows
  * Changes to support IE browser
* Enhancements in "suggest" JavaScript widget:
  * Ability to delete selected item using keyboard
  * Ability to display all available search items, if "recent items" is empty
  * Fixes of behavior of currently selected elements and "spinner"
  * Display "No Records" message in suggest widget if all items already selected
  * Fixed suggest widget to no longer show deleted items
* Improved `Magento_Test_Helper_ObjectManager` in unit tests to discover types of constructor arguments
* Removed workaround of unsetting objects referenced in `tearDown()` of integration tests
* Updated Menu and Navigation layout, including redesigned backend menu item System -> My Account
* Made store address format consistent with format of shipping origin address
* Added ability to navigate directly to a section in backend system configuration, with corresponding accordion expanded
* Removed some of unnecessary coupling between several modules
* General improvements to unit and integration test code coverage, as well as compliance with coding standards
* Application framework:
  * Implemented ability to compress/decompress data in a cache backend
  * Verified ability to disable in configuration triggering of system upgrade
  * Abolished code pools and the mechanism of overriding files using include\_path (without alternative)
  * Implemented segmentation of cache by types -- ability to assign separate cache configuration per type. Reviewed and verified possibility to isolate configuration cache segment
  * Segregated application configuration into several layers. Primary configuration is used by the object manager and loaded before application is initialized
  * Instead of `Zend\Di`, implemented `Magento\ObjectManager` library that has less features and suits Magento application needs better in terms of performance
  * Introduced "context" object as dependencies for super-classes (`Mage_Core_Model_Abstract`, `Mage_Core_Block_Abstract`, etc) to reduce complexity of their constructors' API
  * Implemented tools for pre-populating all auto-generated proxy and factory classes, used by dependency injection framework
  * Replaced "developer" mode with general "mode", that has 3 states: developer, default, production
  * In "production" mode, the application will not invoke fallback for static view files (images, CSS-files, JavaScript). Instead, it will assume that they are already placed in a fully qualified location. Added tools for populating static view files from `app` directory into `pub/static`
  * Introduced support for Twig templating
    * template rendering, including phtml, was abstracted into a 'Template Engine' to make support for other template engines easier
    * included Magento-specific Twig functions and filters
    * phtml templates can now only access public methods of the corresponding Block class
    * ability to define dependencies on data provided by a service that is then made available to the templates -- eliminates some of the code in Blocks
  * Introduced support for webhooks and callbacks: outbound HTTP requests for notifications and real-time integrations
  * Added ability to define options for System Configuration select fields in XML: static options are defined inline, dynamic options can reuse data provided by a service
* Moved product business logic found in blocks into `Mage_Catalog_Service_Product` to consolidate logic into a single structure that both controllers and web services can invoke
* Converted product view page to demonstrate use of Twig templates and services
* Updated shipping carrier `collectRates` logic to support remote callbacks and converted the FedEx shipping carrier to comply with the same interface
* Added webhook support for the following topics: `customer/created`, `customer/updated`, `customer/deleted`, and `order/created`
* Visual design editor:
  * Ability to view all CSS-files of a theme
  * Ported numerous features of visual design editor from Magento Go 1.x to Magento Core 2.x: style editing, managing catalog images
  * Various improvements in UI
  * Improved image sizing functionality
  * Improved test coverage
  * Ability to launch physical themes, including workflow preview mode and workflow design mode
  * Ability to duplicate existing themes for customization
* GitHub requests
  * [#162](https://github.com/magento/magento2/pull/162) -- classmap needs to be prepended to autoloader stack to have any effect
  * [#179](https://github.com/magento/magento2/pull/179) -- fix that makes `Mage_Install` compatible with the new version of SimpleXml
  * [#180](https://github.com/magento/magento2/pull/180) -- fixed `getBaseUrl()` when type was injected via setter
  * [#203](https://github.com/magento/magento2/pull/203) -- fixed problem with login in to backend area on php 5.4
  * [#216](https://github.com/magento/magento2/pull/216) -- explicit nullification of `$_store` in `Mage_Core_Model_Sore_Storage_Db->_initStores()`
  * [#220](https://github.com/magento/magento2/pull/220) -- make topmenu HTML editable by an event
  * [#221](https://github.com/magento/magento2/pull/221) -- changed minimum required PHP version from PHP 5.2.3 to 5.3.3
* Bug fixes:
  * Restored missing Paypal configuration options
  * Fixed numerous display issues on the following pages: admin login, product management, category management, CMS poll, VDE, tax, shipping
  * Fixed XSS vulnerability related to customer data & bundle options
  * Fixed "Preview Theme" functionality
  * Fixed JS File upload problem with Internet Explorer
  * Replaced `truncateOptions` function in `varien/js.js` with inline widget
  * Fixed broken XPaths in `SystemConfiguration.yml`
  * Fixed jQuery metadata plugin's data attribute scanning for validation
  * Synchronized default value of `quantity_and_stock_status` with Stock Availability control
  * Fixed display of G.T. Purchased column in Order grid when order in non-default currency
  * Fixed Foreign Key support for MS SQL
  * Fixed "Create Customer" functionality on New Order screen
  * Restored State/Province field to Review Order page
  * Fixed Add New Tax Rate functionality
  * Fixed problem with displaying New Shopping Cart Price Rule tab
  * Fixed problem of configurable product options getting lost when adding product to wishlist
  * Fixed UPS Shipping label printing
  * Fixed performance issue with Catalog Management
  * Fixed input file type validation when importing customers
  * Fixed custom product placeholder image display
  * Added missing files referenced by `quick\_style.css`
  * Fixed validation error messaging and message placement
  * Fixed access problem to SOAP/XML User and Roles pages
  * Fixed access problem created when editing your own permissions
  * Several fixes for problems with cleaning cache in tag scope
  * Fixed invalid link problem in Gift Card email
  * Fixed problem with deleting selected product category after changing attribute set
  * Fixed theme management for Windows by adopting `Magento_Filesystem` abstraction to access directories
  * Fixed cart rendering in case of empty cart
  * Remove duplicate "Link to Store Front" link from admin, made obsolete by "Customer View" link
  * Removed "Flat Rate" from pre-installed shipping methods

* Implemented functional limitation that restricts max number of catalog products in the system
* Implemented cache backend library model for MongoDB
* Converted some more grids in backend from PHP implementation to declarations in layout
* Removed `app/etc/local.xml.additional` sample file, moved detailed description of possible configuration options to documentation
* Refactored `Mage_Core_Model_EntryPointAbstract` to emphasize method `processRequest()` as abstract
* Moved declaration of functional limitations to the nodes `limitations/store` and `limitations/admin_account`
* Bug fixes:
  * Fixed JavaScript and markup issues on product editing page in backend that caused erroneous sending of AJAX-queries and not rendering validation messages
  * Fixed issues of application initialization in cases when `var` directory doesn't have writable permissions. Writable directories are validated at an early stage of initialization
  * Fixed array sorting issues in test `Magento_Filesystem_Adapter_LocalTest::testGetNestedKeys()` that caused occasional failures

* Application initialization improvements:
  * Removed application initialization responsibility from `Mage` class
  * Introduces entry points, which are responsible for different types of requests processing: HTTP, media, cron, indexing, console installing, etc.
  * New configuration classes are introduced and each of them is responsible for specific section of configuration
  * Class rewrites functionality removed from `Mage_Core_Model_Config` model. DI configuration should be used for rewriting classes
* Added ability to configure object manager with array in addition to object and scalar values
* VDE improvements:
  * Theme CSS files viewing and uploading/downloading of custom CSS file
  * Updated styling of VDE Tools panel
* Refactored various components to an analogous jQuery widget:
  * Refactored components:
    * Category navigation
    * Products management and gallery
    * Send to friend
    * Sales components, including orders and returns
    * Retrieve shipping rates and add/remove coupon in shopping cart
    * Customer address and address book
    * Customer wishlist
    * "Contact Us" form
    * CAPTCHA
    * Weee
  * New tabs widget is used instead of `Varien.Tabs`
  * Refactored `Varien.dateRangeDate` and `Varien.FileElement`
  * Replaced `$.mage.constants` with jQuery UI `$.ui.keyCode` for keyboard key codes
* Refactored configurable attribute, category parent and attribute set selectors to use suggest widget
* Bug fixes:
  * Improvements and bug fixes in new backend theme
  * Image, categories attributes and virtual/downloadable fields are displayed on Update Attributes page, where they shouldn't be present
  * Undefined config property in `reloadOptionLabels()` function in `configurable.js` (Chrome)
  * Impossible to edit existing customer/product tax class
  * Incorrect format of customer's "Date of Birth"
  * Theme preview images are absent in VDE
  * Search by backslash doesn't work for Categories field on product creation page
  * Impossible to assign a category to a product, if category name contains HTML tag
  * Incorrect URL generated for logo image

* All-new look & feel of backend UI -- "Magento 2 backend" theme
  * This theme includes "Magento User Interface Library" -- a set of reusable CSS-classes, icons and fonts
* Theme editing features (in backend UI):
  * Ability to view static resources, such as CSS and JavaScript files, which are inherited by virtual themes from physical themes and application, and library
  * Ability to upload and edit custom CSS/JavaScript code assigned to a particular virtual theme
  * Ability to manage image and font assets for virtual themes
  * The uploaded or edited theme resources are used in page generation
  * Ability to rename virtual themes
  * Physical themes are read-only
* Visual design editor:
  * Ability to enter a "Design Mode" directly from the list of "My Customizations" in "Design Gallery"
  * Updated styling of theme selector and VDE toolbars
* Added functional limitations (managed through configuration files):
  * Ability to limit maximum number of store views in the system
  * Ability to limit maximum number of admin user records in the system
* Introduced mechanism of early discovery of memory leaks in integration tests:
  * Added ability to integration testing framework to detect usage of memory and estimate memory leaks using OS tools outside of PHP process
  * Also ability to set memory usage threshold which would deliberately trigger error, if integration tests reach it
* Refactoring in integration tests:
  * Broke down `Magento_Test_Bootstrap` into smaller testable classes
  * Minimized amount of logic in `bootstrap.php` of integration tests
  * Factored out memory utility functions from memory integration tests into a separate helper
  * Removed hard-coding of the default setting values from `Magento_Test_Bootstrap` in favor of requiring some crucial settings
  * Fixed integration tests dependency on `app/etc/local.xml`, changes in which were involved into the sandbox hash calculation `dev/tests/integration/tmp/sandbox-<db_vendor>-<hash>`
* Improvements in JavaScript widget "Suggest" (`pub/lib/mage/backend/suggest.js`):
  * Added ability to set callback for "item selection"
  * Added ability to provide a template in widget options
  * Implemented "multiple suggestions" ability directly in this widget and removed the "multisuggest" widget
* Converted several grids in backend from PHP implementation to declarations in layout
* Other various improvements:
  * Factored out logic of handling theme images from `Mage_Core_Model_Theme` into `Mage_Core_Model_Theme_Image`
  * Ability to filter file extensions in uploader component
  * Publication of resources linked in CSS-files will only log error instead of crashing page generation process
* Bug fixes:
  * Fixed several memory leaks in different places, related with dispatching controller actions multiple times in integration tests and with excessive reference to `Mage_Core_Model_App` object
  * Fixed integration test in `Mage_Install` module that verifies encryption key length
  * Fixed DHL shipping carrier declaration in config that caused inability to use it with shopping cart price rules
  * Fixed issues in generating of configurable product variations when the button "Generate" is invoked second time
  * Fixed an error that caused inability to create a theme in Windows environment in developer mode
  * Fixed various errors in JavaScript tests for visual design editor
  * Fixed broken "Edit" link on backend product management page

* Implemented ability to customize all the main directory paths for the application, i.e. locations of `var`, `etc`, `media` and other directories
* Implemented ability to pass application configuration data from the environment
* Magento Web API changes:
  * Added SOAP V2 API coverage from Magento 1.x
  * Improved integration testing framework to develop Web API tests. Covered SOAP V2 API with positive integration tests.
  * Changed `Mage_Webapi` module front name from `api` to `webapi`
* Improvements for product creation UI:
  * Implemented AJAX suggestions popup and categories tree popup for convenient assignment of categories
  * Moved selection of Bundle and Grouped sub-products to the "General" tab, implemented popup grids for them
  * Made "Weight" checkbox to be selected by default for a Configurable product
* Implemented integration test to measure and control PHP memory leak on application reinitialization
* Changed format of configuration files for static tests that search for obsolete Magento 1.x code
* Bug fixes:
  * Fixed Web API WSDL incompatibility with C# and Java
  * Fixed issue, that Magento duplicated custom options field for a product, if creating them via a multi-call to API
  * Fixed `shoppingCartPaymentList` method in Web API, which was throwing exception "Object has no 'code' property"
  * Fixed invalid Wishlist link and several invalid links in Checkout on frontend store view
  * Made Stock Status in 'quantity_and_stock_status' attribute editable again for a Configurable product
  * Fixed issue, that it was not possible to save Customer after first save, because "Date Of Birth" format was reported by Magento to be incorrect
  * Fixed fatal error in Code Sniffer exemplar test
  * Fixed wrong failures of `Varien_Db_Adapter_Pdo_MysqlTest::testWaitTimeout()` integration test in developer mode
  * Fixed issue, that mass-action column in backend grids moved to another position in single store mode

* Visual design editor improvements:
  * VDE changes can be saved to DB for current store and theme. Layout updates composed by VDE are combined into one record
  * Introduced temporary layout changes which should store non-applied modifications made during VDE functioning. Added new column `updated_at` to `core_layout_update` table for this, added observers and cron jobs to clean outdated layout updates
  * Added `vde/` prefix to all links inside VDE frame
  * Disabled caching (layout, blocks HTML, etc) in Design mode
  * Reviewed and improved "Quit" action to properly cleanup session, cache and cookies
  * Visual enhancements added when block is being dragged (block display, highlighting, cursor shape)
  * Added ability to set placeholder for a draggable block in VDE canvas
  * Fixed sorting of items within container
  * Improved logic of VDE canvas iframe sizing according to window size to have one scroll bar and static toolbar at the bottom of the page
* Improved themes management:
  * New separate tab on theme edit page which allows to view and download CSS files used on frontend. Files are divided to framework files, library files and theme files
  * Added an ability to upload and store custom CSS file which can be applied on frontend
  * Improved renaming of virtual themes, restricted modifying of physical themes
* Implemented changes in product creation process in admin interface:
  * Added "Variations" block with configurable product attributes in "General" tab. With this block all final prices of configurable product variations can be easily added and configured in one place. Easy sorting mechanism helps understand the order of applying price modifications. "Variations" block can be reloaded itself without reloading all product creation page. All product variations are being created automatically with saving the parent configurable product
  * Improved image management control. Multiple image control is placed in General tab. It provides easier upload and basic management of product's images than image gallery does.
  * Changed Save button on product edit page. Save button is implemented as a split-button with the following options: "Save & New", "Save & Duplicate", "Save & Close"
* Changed representation of a configurable product's image on frontend to use product's variation image instead of parent product's one
* Implemented js-plugin `mage` to give an ability to extend Magento js-code and modify initializing parameters during the runtime. Replaced instantiation of `form` and `validation` instances with `mage` widget
* Implemented autocomplete js-component on backend based on jQuery-ui
* Refactored frontend design theme to use jQuery library instead of Prototype for the following frontend components:
  * Varien Product class – class handles product price calculations on the client side as product price options are changed: `Product.Config`, `Product.Zoom`, `Product.Super`, `Product.OptionsPrice`
  * `RegionUpdater` & `ZipUpdater` classes – classes handle dynamically changing State/Province field from drop down to text field depending on selected country. They also handle "required" setting for State/Province and Zip/Postal Code fields.
  * `Varien.searchForm` – class handles quick search autocomplete functionality
* `VarienForm` class is deprecated
* Improved floating toolbar in backend
* Refactored the following grids in backend to make them configurable through layout, rather than hard-coded: `Mage_Adminhtml_Block_Newsletter_Queue_Grid`, `Mage_Adminhtml_Block_Report_Refresh_Statistics`
* Dependency injection improvements:
  * Added ability to generate proxy and factory classes on-the-fly for use with DI implementations. Generators can be managed in DI configuration
  * Implemented tools (shell scripts) that allow generating skeletons of factory and proxy classes for use with DI implementations
  * Added ability to set preferences to object manager and specify them through configuration
* Refactored the following modules to utilize `Magento_Filesystem` library instead of using built-in PHP core functions directly: `Mage_Adminhtml`, `Mage_Backend`, `Mage_Backup`, `Mage_Captcha`, `Mage_Catalog`, `Mage_Cms`, `Mage_Connect`, `Mage_Core`, `Mage_Install`
* Bug fixes:
  * Fixed bug with incorrect order processing in `Mage_Authorizenet_Model_Directpost`
  * Fixed bug with unnecessary "loading" image on Category field during product editing in backend
  * Fixed bug in `Mage_Adminhtml_CustomerController` with error message during subscription to newsletter
  * Fixed bug in custom option template with incorrect import of custom option during product creation
  * Fixed JavaScript bug with image uploader control on product edit page on backend in IE9
  * Fixed bug with incorrect CSS directives in `app/code/core/Mage/Adminhtml/view/adminhtml/catalog.xml`
  * Replaced usages of Validation Prototype class with jQuery analog in modules `Manage Attributes Sets`, `Reports` and `Order`
  * Fixed bug with Javascript errors in "accordion" tabs and incorrect tab content during product creation.
  * Fixed XSS vulnerability in configurable product on backend product page
  * Fixed inability to update values in PayPal system configuration
  * Fixed "The command line is too long" error triggered by static code analysis CLI tools when the lists become too large
  * Fixed inability to create shipping label for DHL caused by wrong logo image path
  * Fixed inactive navigation menu item of "Import/Export Tax Rates" page

* Changed application initialization procedure
  * Application can be started with specific initial configuration data. `Mage_Core_Model_Config::loadBase()` merges this configuration with the highest priority
  * `Mage` class is no longer responsible for application installation status. `Mage_Core_Model_App` has this responsibility (`Mage_Core_Model_App::isInstalled()`)
* Implemented new library component `Magento_Filesystem` for working with file system
  * New component has more abstract layer of interaction with file system, better path isolation
  * Introduced interface Magento_Filesystem_AdapterInterface for file operations. Added concrete implementation in `Magento_Filesystem_Adapter_Local`
  * Introduced interface Magento_Filesystem_StreamInterface for stream operations with content. Added concrete implementation in `Magento_Filesystem_Stream_Local`
  * Added special class `Magento_Filesystem_Stream_Mode` to set parameters of stream on opening (read-only, write-only etc.)
* Added an ability to skip some service functions for lighter launch of application in `app/bootstrap.php`
* Improved batch tool for launching automated tests. Tool has an ability to run specified test types. Tool was moved from `dev/tools/batch_tests` to `dev/tools/tests.php`
* Improved integration test Mage_Adminhtml_DashboardControllerTest to skip test case when Google service is unavailable
* Improved url building process in new jQuery form widget to have it more secure
* Removed obsolete `@group module::<Namespace_Module>` annotation from integration tests, restricted its further usage
* Updated jQuery library used in application, used unified file name instead of version-based one
* Relocated XSD files for System Configuration, Menu Configuration, ACL Configuration, ACL Configuration for WebApi, Theme Configuration, View Configuration, Validator Configuration to `etc` subfolders of corresponding modules
* Bug fixes
  * Fixed bug with placing order in backend using Authorize.Net Direct Post payment method
  * Changed `Mage_Core_Model_Url` to fix bug with incorrect links on frontend (My Wishlist, Go to Shopping Cart, Continue button at first checkout step)
  * Fixed several bugs after converting backend grids to layout declaration. Changes were made in EAV Attributes, Design, Newsletter, Backup modules
  * Fixed incorrect current working directory behavior on application isolation in tests

* Refactored a variety of grids in backend (admin) to make them configurable through layout, rather than hard-coded. The following classes were affected (converted): `Mage_User_Block_User_Grid`, `Mage_User_Block_Role_Grid`, `Mage_Adminhtml_Block_System_Design_Grid`, `Mage_Adminhtml_Block_Catalog_Product_Attribute_Set_Grid`, `Mage_Adminhtml_Block_Newsletter_Problem_Grid`, `Mage_Adminhtml_Block_Backup_Grid`, `Mage_Adminhtml_Block_Tax_Rate_Grid`, `Mage_Adminhtml_Block_System_Store_Grid`, `Mage_Adminhtml_Block_System_Email_Template_Grid`, `Mage_Adminhtml_Block_Sitemap_Grid`, `Mage_Adminhtml_Block_Catalog_Search_Grid`, `Mage_Adminhtml_Block_Urlrewrite_Grid`, `Mage_Adminhtml_Block_System_Variable_Grid`, `Mage_Adminhtml_Block_Report_Review_Customer_Grid`, `Mage_Adminhtml_Block_Report_Review_Product_Grid`
* Modified behavior of configuration merging. Each config file can be separately validated against DOM schema.
* Moved `Mage_Adminhtml_Utility_Controller` to `Backend` and changed all child classes
* Changes in Profiler system:
  * Created separate component for handling Profiler Driver selection logic
  * Extended `Magento_Profiler::start()` calls with tags as second argument
* Bug fix - Added additional validation into `Mage_Adminhtml_Catalog_CategoryController` to prevent saving new category with any id using firebug

* Visual design editor refactored
  * VDE controls and VDE actions moved to backend area
  * Added IFRAME that allows to navigate through frontend pages in Navigation Mode and to modify blocks position in Design Mode
  * Inline JavaScript code is disabled in Design Mode
  * Store selection is performed on saving instead of reviewing the theme. List of all available stores is shown during assigning the theme to a store
  * `System -> Design -> Editor` page divided into two tabs:
    * "Available Themes" tab contains all available themes
    * "My Customizations" tab contains themes customized by the store administrator and consists of area with themes assigned to stores and area with unassigned themes
  * Added `vde` area code and `Mage_DesignEditor_Controller_Varien_Router_Standard` to handle requests from design editor
  * Added ability to use custom layout instance in controllers to use specific layout, when design editor is launched
* JavaScript updates
  * Replaced `varienTabs` class with an analogous jQuery widget
  * Displaying of loader during AJAX requests became optional
* Removed `dev/api-tests` directory added by mistake
* Bug fixes
  * Impossible to login to backend with APC enabled. Added call of `session_write_close()` in the session model destructor
  * Unnecessary regions shown when no country is selected in `System -> Sales -> Shipping Settings -> Origin`
  * Fixed various bugs caused by virtual themes implementation and other themes improvements

* Enhancements of System Configuration:
  * Introduced new items that can be configured in the similar to Magento 1.x way, using xml files: nested groups in System Configuration form, group dependencies, intersected dependencies
  * Enhanced handling of field dependencies, required fields functionality
  * Changed Configuration structure to be represented as an object model
  * Improved performance of configuration rendering
* Implemented new API in `Mage_Webapi` module
  * Removed `Mage_Api` and `Mage_Api2` modules as obsolete API implementation
  * Added support of REST and SOAP 1.2 [WS-I 2.0](http://ws-i.org/Profiles/BasicProfile-2.0-2010-11-09.html) APIs
  * Introduced versioning per API resource. The application will support old version(s) of API after upgrading to not make old API requests fail
  * Unified implementation for all API types
  * Significantly simplified coverage of new API resources
  * Added two-legged `OAuth` 1.0 for REST authentication
  * Added WS-Security for SOAP authentication
  * Added automatic generation of REST routes and SOAP WSDL on the basis of API class interface and annotations
  * Introduced generation of API reference from annotated WSDL (for SOAP API)
* Introduced service layer. Business logic should be implemented once on service layer and could be utilized from different types of controller (e.g., general or API)
  * Business logic is implemented on service layer to be utilized from different types of controller (e.g., general or API)
  * Implemented abstract service layer class - `Mage_Core_Service_ServiceAbstract`
  * Implemented concrete service layers for customers, orders and quotes. Appropriate duplicate logic has been eliminated from controllers and API
* Improved validation approach:
  * Added support of describing validation rules in a module's configuration file - `validation.xml` in the module's `etc` directory
  * Added `Mage_Core_Model_Validator_Factory`
  * Added new validators to Magento Validator library
  * Added `Magento_Translate_Adapter` as a translator for the validators
  * New approach is utilized in `Mage_Customer`, `Mage_Eav` and `Mage_Webapi` modules
* Added profiling of DB and cache requests
* Minor Improvements:
  * Added an ability to choose the image for logo and upload it from backend web-interface
  * Added notification in backend in case of product SKU change
* Bug fixes:
  * Fixed bug in `Mage_Adminhtml_Sales_Order_CreditmemoController` that changed item’s stock status after each comment
  * Removed `Debug` section in `System -> Configuration -> Advanced -> Developer` for default configuration scope
  * Fixed bug in `Mage_Tax_Model_Resource_Calculation` that prevented placing order with two tax rules having the same rate
  * Removed `Url Options` section in `System -> Configuration -> General -> Web` for website and store configuration scope
  * Changed backend template for UPS shipping provider to fix translation issue
* Fixed security issue - set `CURLOPT_SSL_VERIFYPEER` to `true` by default in cUrl calls
* Added `Zend/Escaper`, `Zend/I18`, `Zend/Validator` ZF2 libraries
* Updated `Zend/Server` and `Zend/Soap` libraries to ZF2 versions