2.0.0.0-dev82

* Added support for MTF Reporting Tool
* Framework improvements:
  * Covered the following Magento application components with unit tests:
      * `ConfigurableProduct/Helper/Data.php`
      * `ConfigurableProduct/Model/Export/RowCustomizer.php`
      * `ConfigurableProduct/Model/Product/Type/Configurable.php`
      * `ConfigurableProduct/Model/Product/Type/Plugin.php`
      * `ConfigurableProduct/Model/Quote/Item/QuantityValidator/Initializer/Option/Plugin/ConfigurableProduct.php`
      * `CatalogSearch/Helper/Data.php`
  * Covered Magento lib with unit tests:
      * `lib/internal/Magento/Framework/DB/Helper/AbstractHelper.php`
      * `lib/internal/Magento/Framework/DB/Tree/Node.php`
* Created Service API for Magento_Catalog Module:
  * Implemented the Product API
  * Implemented the ProductAttributeRead API
* Fixed bugs:
  * Fixed issues with form elements visibility on the backend
  * Fixed an issue where backend forms contained an excessive container
  * Fixed an issue where a wrong category structure was displayed on the Category page
  * Fixed an issue where the pub/index.php entry point was broken because of the obsolete constants
  * Fixed an issue where it was impossible to pass an empty array as an argument in DI configuration and layout updates
  * Fixed an issue with status and visibility settings of a related product on the backend
  * Fixed an issue with unused DB indexes, which used resources, but did not contribute to higher performance
  * Fixed an issue where it was possible to create a downloadable product without specifying a link or a file
  * Fixed an issue where a fatal error occured when opening a fixed bundle product with custom options page on the frontend
  * Fixed an issue where the was a wrong config key for backend cataloginventory
* Processed GitHub requests:
  * [#548] (https://github.com/magento/magento2/issues/548) -- Console installer doesn't checks filesystem permissions
  * [#552] (https://github.com/magento/magento2/issues/552) -- backend notifications sitebuild bug
  * [#562] (https://github.com/magento/magento2/pull/562) -- Bugfix Magento\Framework\DB\Adapter\Pdo\Mysql::getCreateTable()
  * [#565] (https://github.com/magento/magento2/pull/565) -- Magento\CatalogSearch\Model\Query::getResultCollection() not working
  * [#557] (https://github.com/magento/magento2/issues/557) -- translation anomalies backend login page
* Added the following functional tests:
  * Advanced Search
  * Existing Customer Creation
  * Product Attribute Creation
  * Product Rating Creation
  * Sales Rule Creation
  * System Product Attribute Deletion
  * Tax Rate Creation
  * Tax Rule Deletion
  * Update Category
  * Update Category Url Rewrite
  * Update Product Url Rewrite