*Update Mana Shield Spell Power Coefficient - by fukifat.

*Add function void AuraEffect::HandleAuraEffectSpecificMods(bool apply, bool Real, bool changeAmount), and aura effect specific stuff to it.
*More correct aura scaling with lvl for area auras.
*Prevent exploits with relog while having auras with modified amount.

--HG--
branch : trunk

src/game/Player.h

@@ -1276,6 +1276,7 @@ class TRINITY_DLL_SPEC Player : public Unit
         /*********************************************************/
 
         bool LoadFromDB(uint32 guid, SqlQueryHolder *holder);
+        bool isBeingLoaded() const { return GetSession()->PlayerLoading();}
 
         bool MinimalLoadFromDB(QueryResult *result, uint32 guid);
         static bool   LoadValuesArrayFromDB(Tokens& data,uint64 guid);