* 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

* 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

* 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

* Improved Themes functionality to meet the following requirements:
  * Magento instance doesn’t crash in case there’re no themes at all
  * Features like selection of themes in system configuration, custom theme selection in Custom Design, CMS pages, Products and Categories can work without themes. They use base view files only.
  * Virtual themes work in the same way as the non-virtual (which are present in file system) though they additionally have inheritance property. Changes were made in theme switcher, in fallback mechanism, in widgets etc.
  * Non-virtual themes are being added to DB during installation
  * Application framework uses theme id as identifier instead of theme code
* Refactored a variety of report grids in backend (admin) to make them configurable through layout, rather than hard-coded.
* Removed obsolete modules:
  * `Mage_XmlConnect`
  * `Mage_Dataflow`
* Significantly changed Logging subsystem:
  * `Mage_Core_Model_Logger` class is responsible for logging
  * Changes are made to comply with DI paradigm
  * Custom logger in `Mage_Backend_Menu` subsystem is removed due to usage of regular one
* Changes made in autoload process
  * Fixed autoload to prevent `class_exists()` from causing fatal error
  * The `Magento_Autoload` library was divided into 2 classes: `Magento_Autoload_IncludePath` is responsible for loading from include path, `Magento_Autoload_ClassMap` from a class map. Stacked "class map" loader on top of "include path" loader in application bootstrap.
* Implemented new jQuery form widget. Its responsibility is to prepare form for submission (change form attributes if needed)
  * Replaced usage of different instances of `varienForm` with a new form widget (`productForm`, `categoryForm`, instances of type "onclick declaration", "as child component", "instantiation only")
  * Replaced prototype validation with jQuery analog
  * Additionally implemented form widget in different modules (CMS, Customer, Backend, Sitemap, DesignEditor, Tags, SystemEmail, Newsletters, ImportExport, Connect, Authorize.net)
* Minor improvements
  * Fixed css styles for validation messages in different parts of the system
  * Removed usage of `jquery-ui-1.8.21.custom.css`
  * Updated versions of jQuery and jQuery-UI on backend
  * Updated Magento trademark and copyright labels at the bottom of pages: changed legal entity name to X.Commerce, Inc, made translation engine pick them up
  * Improvements made in indexers to stabilize tests. Fixed wrong initialization order of indexers that sometimes caused failure of reindexing all at once
* Bugfixes:
  * Set correct order's data change state during voiding the order
  * Set translator to pick up status labels in drop-down in "Shopping cart price rule" admin grid
  * Fixed an issue in console installer that initialized application in such a way, that it could not load certain event area.
  * Fixed incorrect loader image source in backend during new tax rule creation
  * Fixed JS error in IE with creating products via floating toolbar
  * Fixed image save url during uploading product's images
  * Added permission check for editing shipping and billing addresses during viewing the order
  * Changed saving of order comments from backend. Comment is saved even without status change
  * Added additional validation into `quickCreateAction` of `Mage_Adminhtml_Catalog_ProductController` to prevent saving new product with any id using firebug
  * Fixed JS errors in Authorize.net Direct Post submodule
  * Fixed JS errors in split button on creating product
  * Fixed errors in poll's list template in backend

* Refactoring Magento 2 to use jQuery instead of Prototype:
  * Implemented simple lazy-loading functionality
  * Converted decorator mechanism to jQuery
  * Moved Installation process to jQuery
  * Moved Home, Category and Simple Product View pages to jQuery
  * Moved all frontend libraries from `pub/js` directory to `pub/lib`
* Improved Javascript unit tests to be consistent with other test frameworks in Magento
* Added Javascript code analysis tests to the static tests suite
* Added jQuery file uploader for admin backend, cleaned out old deprecated uploaders
* Implemented fixture of 100k orders for the performance tests
* Fixes
  * Admin menu elements order differs for a cached page and non-cached one
  * Typos in System > Configuration > General Tab
  * Wrong elements positions on "View Order" page
  * Impossible to configure checkout on store scope
  * Warning message in `system.log` when using GD2 image adapter
  * "Preview" link is absent for managing CMS Pages in single store mode
  * "Promotions" tab is missing on Configuration page
  * Wrong format of performance tests config

* Decoupled Tag module functionality from other modules
* Visual Design Editor:
  * Implemented tracking of user changes history and rendering the actions at VDE toolbar
  * Implemented compacting of user changes history. Compacting is done in order to save all the changes as a minimal layout update.
* Improvements:
  * Added Atlassian IDE Plugin configuration files to `.gitignore`
  * Relocated `add_to_cart`, `checkout` and `product_edit` performance scenarios from `samples` to the normal `testsuite` directory. These scenarios can be used for Magento performance testing.
  * Implemented verification of number of orders that were created during execution of `checkout` performance scenario
  * Removed usage of deprecated `PHPUnit_Extensions_OutputTestCase` class from unit tests
* Fixes:
  * Fixed MySQL DB adapter to always throw exception, if it was not able to connect to DB because of wrong configuration. So now the adapter's behavior is not dependent on `error_reporting` settings.
  * Added the missing closing tag to New Order email template
  * Fixed `Mage_ImportExport_Model_Import_Entity_CustomerComposite` integration test issues
  * Marked several integration tests in `Mage_Adminhtml_CustomerControllerTest` as incomplete, as the tested functionality was not MMDB-compliant
  * Fixed issue with unit tests failure, when there was a Zend Framework installed as PEAR package
  * Fixed `advanced_search` performance scenario to fail, if the searched product doesn't exist
  * Fixed issue with non-escaped latest message link in admin backend
* GitHub requests:
  * [#48](https://github.com/magento/magento2/pull/48) -- fixed usage of a collection at the place, where just a single object was needed

* Implemented a tool for migrating factory table names from 1.x to 2.x. The tool replaces table names by list of names associations
* Changed Unit tests suite running from usage AllTests.php in each directory to configuration in phpunit.xml.dist. Now all tests in {{testsuite}} directory are launched, there is no necessity to add new tests to the config
* Implemented in Visual Desig Editor:
  * Containers highlighting
  * Dropping of elements
* Fixed some issues:
  * Fixed sorting of elements in Layout in if element is added before its sibling
  * Fixed broken Customer Registration page on Front-End and Back-End
  * Fixed broken Order Create page on Back-End
  * Replaced usages of deprecated Mage_Customer_Model_Address_Abstract::getFormated() to Mage_Customer_Model_Address_Abstract::format()
  * Fixed elements' duplication on pages (downloadable, bundle product view)
* Fetched updates from Magento 1 up to April 6 2012. Refer to [Magento 1 release notes](http://www.magentocommerce.com/download/release_notes) for details

- Added jQuery to Magento 2. It has not been made a main library yet, however all new features are developed using jQuery.
- Added support for new versions of testing tools - PHPUnit 3.6, PHPMD 1.3.0. Confirmed compatibility with latest PHPCS 1.3.2 and PHPCPD 1.3.5.
- Improved legacy tests:
-- Refactored Integrity_ClassesTest and Legacy_ClassesTest.
-- Implemented a tool for migrating factory names from 1.x to 2.x. The tool scans PHP-code and replaces the most "popular" cases.
-- Added tests for "//model" in config.xml files and "//*[@module]" in all xml files.
-- Implemented a test that verifies the absence of relocated directories.
-- Added a test against the obsolete Varien_Profiler.
- Bug fixes:
-- Fixed phpdoc for Mage_Core_Model_Design_Package.
-- Fixed static code analysis failures related to case-sensitivity.
-- Fixed several typos and minor mistakes.
-- Fixed integration test's failures due to specifics of xpath library version.
- Imported fresh features and bug fixes from Magento 1.x.