2005-07-28  Sven Neumann  <sven@gimp.org>

	* app/core/Makefile.am
	* app/core/cpercep.[ch]: moved cpercep from here ...

	* app/base/Makefile.am
	* app/base/cpercep.[ch]: ... to here.

	* app/base/siox.[ch]: use the cpercep routines for RGB->LAB
	conversion, gives a 20% speedup. Removed normalization which seems
	redundant. Make it work for grayscale and indexed, not only RGB.

	* app/core/gimpdrawable-foreground-extract.c
	* app/core/gimpimage-convert.c: changed accordingly.