[svn] Implemented player on player and player on creature possession:

* Implemented packet and vision forwarding through possessed units
* Added new OnPossess script call alerting scripts on when possession is applied/removed
* Moved fall damage and fall under map calculations into the Player class
* Added new PossessedAI that is applied only while possession on creature is active
* Implemented summon possessed spell effect
* Fixed Eyes of the Beast

--HG--
branch : trunk

src/game/WorldSession.h

@@ -31,6 +31,7 @@ class MailItemsInfo;
 struct ItemPrototype;
 struct AuctionEntry;
 struct DeclinedName;
+struct MovementInfo;
 
 class Creature;
 class Item;
@@ -317,6 +318,7 @@ class TRINITY_DLL_SPEC WorldSession
         void HandleMoveWorldportAckOpcode();                // for server-side calls
 
         void HandleMovementOpcodes(WorldPacket& recvPacket);
+        void HandlePossessedMovement(WorldPacket& recv_data, MovementInfo& movementInfo, uint32& MovementFlags);
         void HandleSetActiveMoverOpcode(WorldPacket &recv_data);
         void HandleMoveTimeSkippedOpcode(WorldPacket &recv_data);