* Scarlet Monastry will now properly scale down to normal difficulty when trying to enter the instance on heroic difficulty
* removed deprecated quest text requirement from access_requirement
* added new access_requirement field to specifiy if a dungeon is only available for heroic difficulty
* added heroic exclusive access_requirement entries for Zul'Gurub, Zul'Aman, End Time, Well of Eternity and Hour of Twilight
* Players will no longer be able to enter dungeons when a encounter is in progress