
0.5.5 changelog:
- added support for arbitrary shapes (not just circles), and included rectangles for buildings
- thusly renamed to UnitShapes instead of UnitCircles
- fixed an error involving unitdefs
- fixed bug where newly created units wouldn't instantly have a circle
- reduced highlight brightness by half
- plays better with other opengl code by using push/popattrib
- uses GetVisibleUnits instead of GetAllUnits