Implemented several categories for debug drawing, which can be set in a [Debug] section within level.cfg files.
Named players accordingly.
Implemented Game.DrawOnScreen(str, [pos]) which automatically determines a position, if none is given.
Implemented GameObject.CalculateBoundingBox.
Implemented Button in terms of a proximity radius instead of physical collision with another object.
Merge branch 'master' of https://github.com/GretelF/squircle
Added level_02 content and adjusted the config.
Implemented release mechanics for buttons.