Moved Coin, CoinArea and Chest to seperate 'Misc' namespace.
Added reminder about writing unit tests
Added MapEntrance for easier addition of entrances on maps.
* Added PreDestroy and PostDestroy initialization Hooks for Entities.
* MapEntrances can now define a target MapEntrance to place the Player
in.
* Added MapEventArgs to LoadMap in order to allow passing of data to
loading maps.
* CreateEntities() and DestroyEntities() methods added to TeeEngine.
Added another map along with fixes to the way map entrances work.
Fixed issue where MapZone was not performing proper intersection check
for MapZoneHit. Also changed MapZoneHitEventHandler delegate signature.
Slight improvements to mountains_example.tmx