BSP support

[lordee]

Pref runtime interpretation of .bsps, otherwise figure out pipeline

[lordee]

https://github.com/Hezkore/quake-toolbox/blob/master/bsp/main.monkey2

https://quakewiki.org/wiki/Quake_Map_Format

http://www.gamers.org/dEngine/quake/spec/quake-spec34/qkspec_4.htm

https://github.com/mikezila/uQuake1

https://github.com/wfowler1/LibBSP

https://github.com/AbitTheGray/BspLib