BSP inteserct .h
What the fuck, slava?
Add and implement bsp_clone
Test for BSP clone
Extracted bsp_intersection()
capitalizationization
_intersection => _intersect
bsp_union()
All the CSG ops are here
Prove that all the transforms work
Back out the hacky clipper and clip node-on-node

Now that we have a fast bsp_clip_polygons() this implementation
makes sense again, and doesn't produce results with a pile
of artifacts.
Merge pull request #21 from sshirokov/csg_ui

CSG API