2004-06-28  Michael Natterer  <mitch@gimp.org>

	* app/widgets/Makefile.am
	* app/widgets/gimpselectiondata.[ch]: new files containing the
	code which encodes/decodes all sorts of stuff to/from its
	GtkSelectionData representation. Used to live in gimpdnd.c

	* app/widgets/gimpdnd.c: use the new functions (unclutters the
	file quite a bit), converted tabs to spaces.