added z-sorting for groups. #8
added name to player shape for debugging
thought background is no re-drawn each frame

graphic.position would have been a helpful to know about earlier
splitting out the re-generation into a function will also help
if we decide to swap out for a sprite or make thought its own class
whitespace to tabs
fixed player box from rendering on top of text

made possible by Person.group object for depth sorting
simple jump the Player shape or sprite between display groups
removed debug code
Merge branch 'master' into feature/layer_groups