Moved doors back to map. Fixed bug in map generation. Added new map generation when player moves out of bounds of current one.
Added transition to the next map. Moved map generation to the Map class.
Added world coordinates. Added HUD.
Added world coordinates saving. Changed savefile version to 4.
Fixed bug with glass wall creation.
Added dummy Transport class - for stairs, lifts, teleports etc.
Moved tile properties from Game back to Map.