* Released Performance Toolkit
 * GitHub requests:
   * [#665](https://github.com/magento/magento2/issues/665) -- Main menu event in wrong area
   * [#666](https://github.com/magento/magento2/pull/666) -- Update di.xml
   * [#602](https://github.com/magento/magento2/issues/602) -- Magento\Sales\Model\Order::getFullTaxInfo() incorrectly combines percentages
   * [#673](https://github.com/magento/magento2/issues/673) -- Fixed fatal error during installation
 * Functional tests:
   * Updated API-functional test for Customer and Address metadata service
   * Add cross sell
   * Add a product to wishlist
   * Add up sell
   * Checkout with gift messages
   * Create an order from a customer
   * Create a shipment for offline payment methods
   * Delete a product from mini shopping cart
   * Reorder
   * Sales order report
   * Updating URL rewrites from a category page
 * Layout updates:
   * Moved layout files to the page_layout directory
   * Moved layout validation files to framework
 * Theme updates:
   * Blank Theme layouts & templates were unified
 * Search Library:
   * Added ability to aggregate queries for MySQL adapter
   * Implemented automatic range aggregation for MySQL adapter
 * Search module:
   * Introduced the Search module
   * Moved autocomplete to the Search module
   * Added base UI to the Search module
 * Documentation:
   * Added basic description of modules in the README.md files
 * Modularity:
   * Created API and script to get module and dependency information
 * Framework Improvements:
   * Decomposed heavy objects basing on profiling results
   * Refactored the getCustomAttributesCodes method in ProductService
   * Refactored Customer Model to use Group Model instead of Group Service
   * Updated Travis configuration to run "composer install"
 * Performance improvements:
   * Removed unnecessary "save order" call during order submission step
 * Fixed missing installation features of the new setup:
   * Added missing installation parameters: admin_no_form_key, order_increment_prefix, cleanup_database
   * Fixed the link to the license agreement in web installer
   * Fixed the web installation wizard which was stuck at 96%
 * Fixed bugs:
   * Fixed an issue where newly created attribute was always added to the Product Details tab
   * Fixed an issue where it was impossible to change the Stock Availability status of a product from the Advanced Inventory tab
   * Fixed an issue where the Stock Status value changed from In Stock to Out of Stock if quantity was not specified
   * Fixed an issue where performance toolkit failed in case of unknown argument
   * Fixed an issue where 404 error page was displayed instead of the URL Rewrite Information page
   * Fixed an issue where the Click for price link was not working if a product name contained quote mark
   * Fixed an issue where the Compare products link disappeared after switching to other page
   * Fixed an issue where the custom logo was not displayed on the category page
   * Fixed an XSS vulnerability in category name
   * Fixed an issue where a success save message was not displayed after saving a Search term
   * Fixed an issue with Google Analytics where it was impossible to add the code to the pages
   * Fixed an issue where import custom options grid was not displayed on the product creation page
   * Fixed an issue where it was impossible to retrieve a product collection from category in the "adminhtml" area
   * Fixed an issue where product attributes were absent on product creation form after switching to another product template
   * Fixed an issue where the 'URL key for specified store already exists.' error message was displayed when saving a configurable product with variations which have the same name
   * Fixed an issue where search in the Search Terms Report grid did not work
   * Fixed an issue where the unnecessary tab "General" was displayed on the Category page in the Admin panel
   * Fixed an issue where the Stock Status value changed from In Stock to Out of Stock if quantity was not specified for a configurable product when saving to a new template
   * Fixed an issue where product Stock Status was always set to 'In Stock' if product quantity was specified
   * Fixed an IE specific issue where for bundle products the Manage Stock option was reset to Yes
   * Fixed an issue where backorder messages were not displayed
   * Fixed an issue where the Price field was always required during Bundle product update using ProductService
   * Fixed an issue where product name was missing in the error message
   * Fixed an issue where configurable product did not contain a message to select options while adding product from wishlist to shopping cart
   * Fixed an issue where the Validate VAT Number button did not work during order creation in the Admin panel
   * Fixed an issue where Item qty in Wishlist got reset after update without changes
   * Fixed an issue where invoice amount was incorrect when items with discount were partially invoiced
   * Fixed product thumbnails alignment in the storefront
   * Fixed an issue where inactive Categories were not greyed out in the tree in the Admin panel
   * Fixed an issue where it was impossible to disable debug mode
   * Fixed the code sample in the index.php file
   * Removed language selector in the setup UI
   * Fixed an issue where setup was broken if db_prefix was used
   * Implemented usage of Symfony's PHPExecutableFinder for executing CLI tools
   * Fixed an issue with the Import/Export functionality
   * Fixed an issue with catalog product/category and category/product indexers invalidation after import
   * Fixed an issue with entering invalid date in the Product Views Report
   * Fixed an issue where it was impossible to view orders for customers from a deleted customer group
   * Fixed an issue where a duplicate customer record was created after adding an order from the Admin panel
   * Fixed an issue where it was impossible to log in to the Admin panel from the first attempt

* 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