incorporate-qhull

TODO
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			[This file was originally written by Barak Pearlmutter <bap@cs.unm.edu>]

			The random number generator in src/geom2.c makes me suspicious.
			Maybe it would be better to switch to random(3).

			The include files used in user code have lots of stuff in them that
			really only the library needs. These could be split out.

			Hook into that debian library-switches gizmo.

			Separate versions of all functions for various floating point
			precisions. Perhaps via multiple #include's.

			Convert executables to getopt and --help, and stop using isatty.