• Fixed taint issues involving secure frames due to overriding RegisterEvent/UnregisterEvent methods.
  
• EventHandler will now halt if false is return on _REGISTER(), _UNREGISTER(), _TRIGGER() functions.
  
• Added support for event RAID_ROSTER_UPDATE <=> GROUP_ROSTER_UPDATE.
  
• Added GROUP_ROSTER_UPDATE_TRIGGER(), which will limit GROUP_ROSTER_UPDATE to only fire once depending on group type.
  
• Tidy up some code.