rules 7.x-2.7

Changes since 7.x-2.6:

• #1284266 by fearlsgroove, mitchell, David Stosik, PatchRanger: Condition: "list has count".
• #2120421 by bojanz, klausi: Fixed warning: call_user_func() expects parameter 1 to be a valid callback, function 'rules_events_entity_unchanged' not found.
• #2219325 by dasjo: Allow null for optional parameters when using the data create action.
• #2219055 by Dave Reid: Add a 'block IP address' action.
• #2132957 by cafuego, maximpodorov: Fixed call to undefined function rules_user_account_email_options_list() in 7.x-2.6.
• #2105113 by tien.xuan.vo: Fixed Error: Missing required module 0.
• #1962040 by BWPanda: Component name on schedule page doesn't link to correct place.
• #2158635 by colan: Only execute Rules scheudler update 7204 when really necessary.
• #2104263 by fago | maked1sky: Added BC support for old Rules Scheduler queue items.
• by fago: Fixed accidential deletion of scheduled tasks when components are reverted.