Paddle movement

Another "small" update, this time it's the paddle movement. I implemented swaying of the paddle as it moves. Idea behind this is to give player a possibility to control the angle witch the ball hits the paddle and change the ball's trajectory. Animation is not as smooth as I would like but that will come with another graphic update to the paddle (maybe some kind of customization). 

Another thing that has changed is the way powerups work. Now expand and shrink powerups don't stack and cant be activated while one of them is active, instead picking them up while effect of one of them is in effect gives 100 points.

Next update should be quicker then this one, have fun everyone