Get rid of Trinity Singleton and Threading patterns and replace them with ACE_Singletons and ACE_GUARD_x macro´s with ACE_Thread_Mutex´es respectively.

Also get rid of unused CountedReference class that used Trinity threading pattern.

--HG--
branch : trunk

src/server/game/Entities/Unit/Unit.cpp

@@ -14062,7 +14062,7 @@ void Unit::StopMoving()
 
     // send explicit stop packet
     // rely on vmaps here because for example stormwind is in air
-    //float z = MapManager::Instance().GetBaseMap(GetMapId())->GetHeight(GetPositionX(), GetPositionY(), GetPositionZ(), true);
+    //float z = sMapMgr.GetBaseMap(GetMapId())->GetHeight(GetPositionX(), GetPositionY(), GetPositionZ(), true);
     //if (fabs(GetPositionZ() - z) < 2.0f)
     //    Relocate(GetPositionX(), GetPositionY(), z);
     //Relocate(GetPositionX(), GetPositionY(),GetPositionZ());