IDrawer.draw() and ITicker.tick() now throw SlickExceptions.
* IDrawer now has a GameContainer argument.
IPlayerController now extends ITicker and IDrawer, because it's essentially a client object.
Implemented an object to handle starting game arguments, and put it to use.
* The screen size, the FPS display, VSync, the FPS cap, the music, the sound, the latter two's volumes and fullscreen are all modifiable.
* Not to mention the FPS is now capped by default at 120.
Made a debugging boolean.
Made a TestDrawer for debugging Slick's rendering engine, as well as the game's rendering engine itself.