fixing some more bugs
the application is not functional yet

modified:   pong.erl
Merge branch 'master' into dev

Conflicts:
	src/pong.erl
changing the input system to a non practical but functionning version

modified:   pong.erl
correcting a bug

modified:   pong.erl
	modified: update_ball
	implemented: update_ball_aux
fixing bouncing bug

modified:   pong.erl
fixing flip gamestate

modified:   pong.erl