Initial setup for Mac OSX support.
Pull Request: https://github.com/GarageGames/Torque3D/pull/1785
Compiles, runs, plays. We've noted performance is lower than other platforms, so if you guys can provide additional metrics on differing hardware, we can try and narrow down where the major bottlenecks are. Most of the mac devices just don't have that good of hardware or drivers for OpenGL, but there are no doubt some bottlenecks that can be found and fixed all the same.