2008-05-21  Sven Neumann  <sven@gimp.org>

	Add Desaturate as an image-map tool with live preview (bug #533808):

	* app/gegl/Makefile.am
	* app/gegl/gegl-types.h
	* app/gegl/gimpdesaturateconfig.[ch]: added config object for the
	desaturate point filter.
	
	* app/gegl/gimpoperationdesaturate.[ch]: derive from
	GimpOperationPointFilter. Unrolled the inner loop.

	* app/core/gimpdrawable-desaturate.c: changed accordingly.

	* app/tools/Makefile.am
	* app/tools/gimpdesaturatetool.[ch]: added desaturate as an
	imagemap tool. So far only the GEGL code path is implemented.

	* app/tools/gimp-tools.c: register the new tool.

	* app/dialogs/dialogs.c: register the new tool dialog.

	* app/dialogs/Makefile.am
	* app/dialogs/desaturate-dialog.[ch]: removed the desaturate dialog.

	* app/actions/drawable-actions.c
	* app/actions/drawable-commands.[ch]: removed action
	"drawable-desaturate".

	* app/widgets/gimphelp-ids.h: changed help IDs accordingly.

	* menus/image-menu.xml.in: replaced "drawable-desaturate" with
	"tools-desaturate".

	* libgimpwidgets/gimpstock.h: added a define for
	GIMP_STOCK_TOOL_DESATURATE.

svn path=/trunk/; revision=25726