[7399] Rewrited BattleGround starting code - moved it to battleground class. Author: Triply

Fixed message color for premature finish warnings.
    Fixed .debug bg command won't allow 1v0 arenas now, only battlegrounds 1v0.
    Added battleground announcer message removed in [7384].

[7401] Fixed bgqueue invitation to already started battlegrounds - not tested. Author: Triply

--HG--
branch : trunk

src/game/BattleGroundAB.h

@@ -240,6 +240,8 @@ class BattleGroundAB : public BattleGround
 
         void Update(uint32 diff);
         void AddPlayer(Player *plr);
+        virtual void StartingEventCloseDoors();
+        virtual void StartingEventOpenDoors();
         void RemovePlayer(Player *plr,uint64 guid);
         void HandleAreaTrigger(Player *Source, uint32 Trigger);
         virtual bool SetupBattleGround();