Removed unused variables
Removed another PHPCS exception, now fixed in Coder
Updated PHPCS config for new released Coder version
Issue #2663934: Convert rules_ui plugin definitions to objects, generate basic UI routes and convert the existing UI to use the generated routes.
Issue #2662816 by martin107: Added missing @group for UI embed test
Issue #2659954: Fixed bogus UI cancel test
Issue #2659954: Enable web server output in Travis CI for backtracing random test fails
Issue #2659808: Improved browser tests to check for PHP errors
Issue #2659806 by Cogax, klausi: Fixed PHP warnings when adding an action
Issue #2663572: Add integrity violation UUID where it is created
Issue #2659932 by fago: Allow modules to define Rules UI instances via yaml files.
Issue #2659990 by vasi1186: Creating reaction rules via API does not trigger container rebuilds
Issue #2662464 by fago: Move RulesEventManager below the Core sub-namespace.
Issue #2661362: @file block for kernel tests incorrect namespace updated.
Issue #2660000 by fago: Correct RulesDefaultEeventHandler::getContextDefinition() to consider refined context.
Issue #2660000 by fago: Small improvements / fixes for the documentation of RulesConfigurableEventHandlerInterface.
Issue #2660000 by fago: Add todo for cloning execution state before execution another reaction rule.
Updated Travis CI to run composer install for Drupal 8.1.x
Issue #2658372 by Cogax: Complete Entity Create action context refining
Issue #2660000 by fago: Leverage event plugin classes as event handlers.
Issue #2659680 by klausi: addExpressionObject() method should always return $this.
Removed unused methods from ExpressionBase
Issue #2655604: Added integrity checks for data type matching
Issue #2658960 by klausi: Create the loop action expression plugin
Issue #2660204: Fixed false integrity check violations on provided variables when they are used
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