rules 7.x-2.4

Changes since 7.x-2.3:

• #2052317 Add support for rule / action / event / condition categories in addition to groups.
• #1724454 by ptmkenny: Fixed 'Rules scheduler: User provided identifier' cannot be used as a filter in Views.
• #2054595 by plach, das-peter | OnkelTem: Fixed Infinite loop in _rules_discover_module() function.
• #2059621 by dasjo: Align event operations markup with conditions and actions.
• #2058037 by dasjo: Support all entity properties in the entity query action.
• #2050225 by heddn: Add the ability to allow NULL values when creating data based on property info.
• Make scheduling tasks more robust and log any execution problems.
• #2050649 by fago: Support implementing conditions and actions via classes.
• Follow-up to #2049287: Fixed problem when using rules UI with 'administer rules' permission only.
• #2049509 by fago: Allow data types to expose selectable options.
• #2049287 by fago: Fixed Rules UI is not re-usable without 'administer rules' permission.
• Follow-up to #2045785: Keep the original module and owner when cloning a configuration.
• Fixed translate link to be hidden when rules_i18n is disabled.
• #2045785 by fago: Keep track via which UI a rule has been configured.
• #2023519 by fubhy: Added support for task handlers and event dispatchers.
• #1019646 by fago, pillarsdotnet, Shnapoo: Fixed Rules Debugger calls user_access() too early.
• #1555634 by fago, catch, pdrake: Fixed Improve performance of event cache by moving to a whitelist.
• #2012490 by joakimforsgren | kristofferwiklund: Fixed Wrong file permission on some files.
• #2008192: Block components executed via rules_scheduler_run_task() to avoid recursion during a scheduled task run.
• #1993932: Add support for event settings and add an optional bundle setting for entity events.
• #1573014 by zhangtaihao, TuWebO, fago | timb: Fixed Elements in table are not in correct order after saving rule with more than 10 elements.
• Support min/max operations in action 'Calculate a value'.
• #1682524 by zhangtaihao: Fixed Container plugin does not trace basic dependencies.