Core/Groups: Move all function definition from .h to .cpp

Core/Groups: Remove Group.h dependency from any .h file

--HG--
branch : trunk

src/server/game/Maps/Map.cpp

@@ -29,6 +29,7 @@
 #include "ObjectAccessor.h"
 #include "MapManager.h"
 #include "ObjectMgr.h"
+#include "Group.h"
 
 #define DEFAULT_GRID_EXPIRY     300
 #define MAX_GRID_LOAD_TIME      50

src/server/game/Maps/MapInstanced.cpp

@@ -23,6 +23,7 @@
 #include "VMapFactory.h"
 #include "InstanceSaveMgr.h"
 #include "World.h"
+#include "Group.h"
 
 MapInstanced::MapInstanced(uint32 id, time_t expiry) : Map(id, expiry, 0, DUNGEON_DIFFICULTY_NORMAL)
 {

src/server/game/Maps/MapManager.cpp

@@ -33,6 +33,7 @@
 #include "ObjectMgr.h"
 #include "Language.h"
 #include "WorldPacket.h"
+#include "Group.h"
 
 extern GridState* si_GridStates[];                          // debugging code, should be deleted some day