Fixed paths in the images.
Re-designed the collision handling mechanism. Moved away from a Visitor pattern of many collision-handlers. Moved to the multi-method rcd discussed which encapsulates all that logic in one class - CollisionManager.java.
Increased granularity to the CollisionManager. Now, someone can check to see if the intersection happen (with respect to sprite1), at the top/bottom/left/right.
Merge branch 'master' into scrolling_platformer
Merge branch 'master' of github.com:duke-compsci308-spring2013/vooga