2.0.0.0-dev55
* Modularity improvements:
  * Session configuration moved to library
  * FormKey logic was moved from Session
  * SessionIdFlags from Session was removed
  * Move Page logic to the Theme module and library
* Created integration module UX
* Created authorization service (Magento_Authz module)
* Fixed bugs:
  * Fixed the issue that prevented a customer group's shopping cart rules from applying properly to prices. The issue occurred when a customer was manually assigned to a customer group and automatic group assignment was enabled.
  * Fixed the bug with schema upgrade scripts not running after installation
  * Fixed the error with a blank page when user tries to get access to a restricted resource via URL (add Secret Key for URL set to "No")
Merge remote-tracking branch 'upstream/master'

* upstream/master:
  2.0.0.0-dev55 * Modularity improvements:   * Session configuration moved to library   * FormKey logic was moved from Session   * SessionIdFlags from Session was removed   * Move Page logic to the Theme module and library * Created integration module UX * Created authorization service (Magento_Authz module) * Fixed bugs:   * Fixed the issue that prevented a customer group's shopping cart rules from applying properly to prices. The issue occurred when a customer was manually assigned to a customer group and automatic group assignment was enabled.   * Fixed the bug with schema upgrade scripts not running after installation   * Fixed the error with a blank page when user tries to get access to a restricted resource via URL (add Secret Key for URL set to "No")