Code cleanup and halfway fix of the ball rotation.
Abandon image flip / rotate for left feature, the space ship just drives 
like a normal vehicle.
Ball rotating fixed.
New :
	- ball
	- corners location on shapes
	- center circle with actual relative size
	- better sized field
	- unit testing
	- lots of code refactoring
Cleanup
Delete ghost files..
unitTesting -> test
Test cleanup
Move most of the Field methods to shape, as they are generic for 
rectangles/squares
Start using enums.
Code cleanup
The ball is drawn properl now and goals.
Draw goal lines from field.
Goal detecting is getting better, now I need to fix the border detection
Ball score system now fixed.
Code cleanup.
Player can move in a goal
Code cleanup
Update the speed when moving diagonally so it is more natural.
Code cleanup