* For better fit name to related map type class InstanceMap renamed -> DungeonMap.
This clarify usage Instanceable()/IsDungeon() because BG/Arenas maps also instanceable maps.
* InstanceSave have many code related to only DungeonMap case, so it replaced by 3 new classes:
- MapPersistentState as base class, used for non-instanceable maps (continents and some other) (!Instenceable())
- DungeonPersistentState subclass of MapPersistentState, used for DungeonMap states (IsDungoen())
- BattlegroundPersistentState subclass of MapPersistentState, used for BattlegroundMap states (IsBattleGroundOrArena())
Now all dungeon resets code moved to subclass and all player/gpoup bound functions/structures also use it.
* Map::GetInstanceSave renamed to Map::GetPersistentState and DungeonMap have specialized version
return DungeonPersistentState (same pointer in fact with proper subcalss type)
* InstanceResetScheduler renamed to DungeonResetScheduler
Also fix wrong use INVALID_HEIGHT as height value.
It must be used only for _check_ height, and DON'T must use as real height value.
Must fix some wrong height check results.
Signed-off-by: VladimirMangos <vladimir@getmangos.com>
