Tue May 20 00:25:10 2008  Jiri (George) Lebl <jirka@5z.com>

	* src/matrixw.[ch], matop.c, src/eval.c, src/funclib.c:  Optimize
	  matrix manipulation a bit.  Don't be overly conservative with
	  making things private.  And OMG we used Gauss-Jordan instead of
	  backaddition.  Also when the matrix is not rational, do pivotting
	  (use largest entry, not first nonzero one)

	* src/mpwrap.c: fix mpw_abs if called with same arguments for in and
	  out and add mpw_abs_sq for getting the absolute value squared,
	  which doesn't involve a sqrt

	* src/genius.c, src/gnome-genius.c, src/eval.[ch], src/matrixw.c: 
	  init the_zero during the startup

	* src/mpzextra.c: very minor optimizations

	* src/Makefile.am: fix BUILDDIR setup


svn path=/trunk/; revision=653