Removed unused 'using' directives in IController.
Removing unusing 'using' directives in KeyboardController. Adding some comments.
Adding some comments to MapHelper.
Changing the visibility of a bunch of SpriteComponent's properties. Adding some comments.
Fixed small bug in Wall.
Added some comments to MapLoader.
Changed the position of the HUDs.
SourceRectangle property of AnimatedSprite is now computed on demand. Adding some comments to AnimatedSprite.
Polishing projectiles.
Cosmetic fixes.