bump mapping for quake 2

https://github.com/netpipe/SDLQuake2-Dirty/tree/master/source/SDLQuake2-0.1.4

gl_image.c probably needs https://github.com/netpipe/IrrlichtDemos/tree/master/Other/SDL-bumpmap this put into it somehow.

i can pay at end of month should be easy project hopefully, if not i can pay more next month.