2.0.0.0-dev66

* GitHub requests:
  * [#134] (https://github.com/magento/magento2/pull/134) Fixed a typo in "Vorarlberg" region of Austria (was Voralberg)
* Fixed bugs:
  * Fixed an issue with the "Add to Cart" button on the MAP popup of compound products
  * Fixed an issue where the "Add Address" button for Customer in Admin was broken
  * Fixed an issue where predefined data are not loaded for a newsletter when it is added to a queue
* Indexer implementation:
  * Implemented a new optimized Catalog Category Product Indexer
  * Implemented a new optimized Catalog Category Flat Indexer
  * Implemented a new optimized Catalog Product Flat Indexer
* Modularity improvements:
  * Moved all Configurable Product functionality to a newly created ConfigurableProduct module
  * Moved the Shortcut Buttons abstraction from PayPal to Catalog
  * Moved the Recurring profile functionality to a separate module
  * Moved the Billing Agreements functionality to the PayPal module
  * Finalized the work on resolving dependencies between the Multishipping module, and all other modules. Module can be removed without any impact on the system
* Customer Service usage:
 * Updated Customer Group Grid to use Customer Service for data retrieving and filtering
 * Updated CustomerMetadataService::getAttributeMetadata to throw an exception if invalid code is provided
* Unified the format of specifying arguments for class constructors in DI and in Layout configuration:
  * A common xsd schema is being used for defining simple types. Layout and DI customize common types with their specific ones
  * Argument processing is unified, and moved to library