setup the BSP scene manager. Can't rotate the world geometry, so had to change the setup of the camera, which is more tricky.
load bsp and textures directly from the pk3
OSX fixes
split off the bsp loading to a new compiled target
use command line parms, scan for pk3, add them in order
Merge branch 'bsp' of git://github.com/TTimo/es_core
Make sure czmq.h is above SDL.h.