2008-05-13  Michael Natterer  <mitch@gimp.org>

	First prototype of a button in the levels tool dialog that will
	jump the the curves tool with the same settings:

	* app/gegl/gimplevelsconfig.[ch]: add new function
	gimp_levels_config_to_curves_config() which converts a
	GimpLevelsConfig to a GimpCurvesConfig. Still lacks support
	for gamma.

	* app/tools/gimplevelstool.c: add "Edit this Settings as Curves"
	button and jump to curves when clicked. Still ugly.


svn path=/trunk/; revision=25654