Added methods to get a single IMapObject from the Map.
Moved Game creation from GameState to a new class GameContent. Simplified Map building with a new WorldBuilder.AddMap method. Cleaned up the demo level and implemented opening a normal door. Removed useless map boundary checks because this will never if the map is created correctly.
Added an intro message.
Added the prison guard that lets the player know what to do. Created base class Being for PlayerFigure and Guard. Modified Door to raise an event when opened or closed.