Issue #1008166 by sun, catch, rootatwc, Rob Loach, Jody Lynn: Actions should be a module.

core/includes/bootstrap.inc

core/includes/common.inc

core/modules/action/action.admin.inc

core/modules/action/action.api.php

core/modules/action/action.info

core/modules/action/action.install

core/modules/action/action.module

...ules/action/lib/Drupal/action/Tests/ConfigurationTest.php

core/modules/action/lib/Drupal/action/Tests/LoopTest.php

...dules/action/tests/action_loop_test/action_loop_test.info

...es/action/tests/action_loop_test/action_loop_test.install

...les/action/tests/action_loop_test/action_loop_test.module

core/modules/system/system.admin.inc

core/modules/system/system.api.php

core/modules/system/system.install

core/modules/system/system.module