Commerce Gate for Drupal 0.1.2-beta1

First official public beta, including Revision 2.
Canonical Commerce source: 766d6833c8b3a4ea23fa0730d5ca4ff5c880718f
Public module source: 4c632a75578e2f4c6e1d2c982e266cf82e6d4aba
Validated by five Commerce Drupal acceptance profiles and DrupalCode pipeline 1031327.
New service authorities remain disabled pending rollout evidence and staging acceptance.