Added Projector.unproject function to provide an equivalent 3D position from a provided 2D one. Fixed issue with body scale being incorrectly halved in dimensions.
Added new projection code, using more mathematically correct projection angle rather than ratio.
Changed TRUE projection to ISOMETRIC and added MILITARY as a third projection preset const.
Further refined projection and unprojection code - small drift on Y axis to be fixed still.
Fixed new projection routine to correctly handle unprojection. Added contains and containsXY methods to Cube.