Stuck regarding AABB and JBox2D.

Look at shiffman's nature of code and his PBox2D. I should probably
incorporate this instead of JBox2D. This is because of the coordinate
system problem. This may be why the AABB overlap / contains functions
aren't working. They *probably* still should work but I feel I've tried
everything. I should switch to PBox2D, use the coordWorldToPixels()
methods, and try this again.