* Various improvements:
    * Refactored Service Layer of the Magento_Tax Module
    * Stabilized functional tests for the Backend module
    * Stabilized functional tests for the CatalogRule module
    * Stabilized functional tests for the Checkout module
    * Stabilized functional tests for the CurrencySymbol module
    * Stabilized functional tests for the Shipping module
    * Stabilized functional tests for the Tax module
    * Stabilized functional tests for the User module
* Added Readme.md files to the following modules:
    * Magento\RequireJs
    * Magento\Ui
* Fixed bugs:
    * Fixed an issue where product image assignment to a store view was not considered when displaying a product
    * Fixed shipping address area blinking when billing address is filled during checkout with a virtual product
    * Fixed an issue where filter_store.html was not found
    * Fixed an issue where the customer account access menu did not expand on the storefront
    * Fixed an issue where CMS blocks...