Split out BSP data structures and functions.
Use the newly split out BSP functions.
Add BSP test.
Don't lie in the comments
Merge remote-tracking branch 'refs/remotes/origin/master' into bsp-test
Merge remote-tracking branch 'refs/remotes/origin/master' into bsp-test
Remove the useless var
New `poly_p *poly_make_triangle(f3, f3, f3);` allocator
Death to custom helper
Cleaned up the bsp test to use poly_make_triangle()
Add a front poly bsp test.
Merge pull request #2 from sshirokov/bsp-test

Add some BSP tests.