Wed Nov 14 20:13:29 2007  Jiri (George) Lebl <jirka@5z.com>

	* src/matop.c: fix possible memory corruption in the gauss
	  routine

	* src/matrixw.c: slight optimization to not copy zeros

	* src/funclib.c, lib/linear_algebra/*.gel: Implement NullSpace
	  and PivotColumns internally for speed.

	* src/gnome-genius.c: remove some unused vars

	* src/geniustests.txt, src/nullspacetests.txt: add tests for
	  PivotColumns and NullSpace


svn path=/trunk/; revision=612