Change the name of GameState to GameApp since it's not actually a state but the app from which we launch the game.
Change IEntityController to contain more useful methods that we think we might use in all entitys.
Deleted the Main-class since there was already an excisting main-method in the previously called GameState-class, now called GameApp.
This is only a leftover from changing jarfiles.
Apparently I have to commit this to be able to pull and push so...
I do not know what I did here.