Blender Git Loki

- Added csg.dsp to the main intern workspace (intern.dsw)
- Fixed up the paths for "/lib/..." in csg.dsp

Quick note: Currently intern still builds the old lib (bsplib).

To compile the new lib (when everything is ready for it), uncheck
bsplib from the dependancies in build_install_all and replace with csg.
Will eventually drop bsplib completely - but not just yet :)