[svn] -enabled instantiated battlegrounds

-enabled arena matches
-rewritten battleground queuing to support joining as group
-removed queue announcements

--HG--
branch : trunk

src/game/Unit.h

@@ -1003,6 +1003,7 @@ class MANGOS_DLL_SPEC Unit : public WorldObject
         void RemoveAurasWithDispelType( DispelType type );
 
         void RemoveAllAuras();
+        void RemoveArenaAuras(bool onleave = false);
         void RemoveAllAurasOnDeath();
         void DelayAura(uint32 spellId, uint32 effindex, int32 delaytime);