* Fixed bugs:
  * Fixed an issue where an invalidly filled option did not become in focus after saving attempt on the Create New Order page in the backend
  * Fixed an issue with the default configuration not being applied properly in the CAPTCHA configuration section
  * Fixed an issue with optional State/Province fields on the Create New Order page being marked as required
  * Fixed an issue with incorrect Customer model usage on session in community modules
  * Fixed an issue where cache was not invalidated after applying catalog price rule
  * Fixed an issue where an admin with custom permissions could not create Shopping Cart Price Rule/Catalog Price Rule
  * Fixed an issue with REST request and response format being inconsistent
  * Fixed an issue where there was an error on a bundle product page if bundle items contained an out of stock product
  * Fixed a JS issue which appeared when adding associated products for a grouped product
  * Fixed an issue where layered navigation was absent on the Advanced Search results page
  * Fixed an issue where the leading "0" in numbers were truncated when exporting using Excel XML
  * Fixed the price type attribute filter in Layered Navigation
  * Fixed an issue with a fatal error in \Magento\Framework\ArchiveTest when bz2 extension was not installed
  * Fixed an issue where an admin could search product by attributes set on the Store View level (except default store view)
  * Fixed an issue where extra spaces in search values were not ignored during search and thus wrong search results were given
* GitHub requests:
  * [#542]  Fix ImportExport bug which occurs while importing multiple rows per entity
  * [#544]  Performance tests not working
* Framework improvements:
  * Covered the following Magento application components with unit tests:
      * `Customer/Model/Address.php`
      * `Customer/Model/Address/AbstractAddress.php `
      * `Customer/Model/Address/Converter.php`
      * `Customer/Model/Customer.php`
      * `Customer/Model/Customer/Attribute/Backend/Billing.php`
      * `Customer/Model/Customer/Attribute/Backend/Shipping.php`
      * `Customer/Model/Customer/Attribute/Backend/Store.php `
      * `Customer/Model/Customer/Attribute/Backend/Website.php `
      * `Customer/Model/Customer/Attribute/Backend/PasswordTest.php`
      * `Customer/Helper/Address.php`
      * `Customer/Helper/View.php`
      * `Customer/Service/V1/CustomerAccountService.php`
  * Covered Magento lib with unit tests:
      * `lib/internal/Magento/Framework/Filter/*`
      * `lib/internal/Magento/Framework/Model/Resource/Db/AbstractDb.php`
      * `lib/internal/Magento/Framework/Model/Resource/Db/Collection/AbstractCollection.php`
      * `lib/internal/Magento/Framework/File/Uploader.php`
      * `lib/internal/Magento/Framework/File/Csv.php`
      * `lib/internal/Magento/Framework/Less/File/Collector/Aggregated.php`
      * `lib/internal/Magento/Framework/Less/File/Collector/Library.php`
      * `lib/internal/Magento/Framework/Locale/Config.php`
      * `lib/internal/Magento/Framework/Locale/Currency.php`
      * `lib/internal/Magento/Framework/App/Config/Element.php`
      * `lib/internal/Magento/Framework/App/Config/Value.php`
      * `lib/internal/Magento/Framework/App/DefaultPath/DefaultPath.php`
      * `lib/internal/Magento/Framework/App/EntryPoint/EntryPoint.php`
      * `lib/internal/Magento/Framework/App/Helper/AbstractHelper.php`
      * `lib/internal/Magento/Framework/App/Resource/ConnectionFactory.php`
      * `lib/internal/Magento/Framework/App/Route/Config.php`
  * Implemented the ability for a mobile client to get a partial response
  * Added authentication support for mobile
  * Refactored the Oauth lib exception not to reference module classes
  * Moved the authorization services according to the new directory format: was \Magento\Authz\Service\AuthorizationV1Interface, became \Magento\Authz\Service\V1\AuthorizationInterface
  * Moved the integration services according to the new directory format:
    * Was \Magento\Integration\Service\IntegrationV1, became \Magento\Integration\Service\V1\Integration
    * Was \Magento\Integration\Service\OauthV1, became \Magento\Integration\Service\V1\Oauth
  * Improved security of the integration registration
  * Introduced language packages with ability to inherit dictionaries
* Improved modularity of ImportExport
* Created Service API for Magento_Catalog module:
   * Implemented Product Attribute Media API
   * Implemented Product Group Price API
   * Implemented Product Attribute Write API
   * Implemented Product Attribute Options Read and Write API
* Created Service for the Magento Tax module:
  * Implemented Tax Rule Service
  * Implemented Tax Rate Service
  * Implemented Tax Calculation Data Objects
  * Implemented Tax Calculation Builders
  * Implemented Tax Calculation Service
* Covered the part of the Catalog Module with unit tests
* Added PayPall Bill Me Later button
* Streamlined checkout experience
* Improved order review page for PayPal Express Checkout