2003-05-20  Michael Natterer  <mitch@gimp.org>

	Some color API cleanup:

	* libgimpcolor/gimpcolortypes.h: added struct GimpHSL. All values
	are doubles in a [0.0..1.0] range.

	* libgimpcolor/gimpcolorspace.[ch]: changed the GimpRGB <-> HSL
	functions to use the new struct instead of separate hue, saturation
	and lightness doubles. Note that the hue range has changed from
	[0.0..360.0] to [0.0..1.0].

	* app/base/colorize.c (colorize_calculate)
	* plug-ins/common/AlienMap2.c (transform): changed accordingly.