Fixed non-panning camera after switching scenes.
Added some helper methods for fetching and creating animations to hopefully help clean up some of the massive blocks of animation loading code.
Updated the animation loading code with the new, cleaner Assets.getAnimation() method.
Fixed typo in asset file string
Extended Scene2 quite a bit.

Rearranged some stuff in GameScreen to make it easy to code in going straight to Scene2
Updated Scenes' header comments