skeleton for HCP node generator
interim commit, working on hcp
interim commit
another interim commit
another interim commit
interim commit
interim commit
interim commit
interim commit
interim commit, getting near a reasonable hcp box
interim commit, still need to carve a sphere
interim commit
Using local temporary variables in the geometry method, and implementiung the optional
sphere chisel. I think this is now a working, semi-tested, HCP node generator.
	renamed:    MoreNodeGenerators.py -> PlanetNodeGenerators.py