Removed MonsterManager's Singleton status, RoomData now has mgr members

RoomData now has monsterMgr and waypointMgr members, so that it can
compare it's characters to the monster & waypoints, etc.

RoomManager has been updated. It now has a database reference, which is
passed to the monsterMgr of new rooms. The room API also has functions
which expose these managers to lua.

server/rooms/room_data.cpp

@@ -41,6 +41,14 @@ RegionPagerLua* RoomData::GetPager() {
 	return &pager;
 }
 
+MonsterManager* RoomData::GetMonsterMgr() {
+	return &monsterMgr;
+}
+
+WaypointManager* RoomData::GetWaypointMgr() {
+	return &waypointMgr;
+}
+
 std::list<Entity*>* RoomData::GetEntityList() {
 	return &entityList;
 }