2001-02-11  Michael Natterer  <mitch@gimp.org>

	* app/Makefile.am
	* app/apptypes.h
	* app/gimpdata.[ch]: new abstract base class for everything
	(except images) which has a filename and can become dirty and must
	be saved.

	* app/gimpbrush.[ch]
	* app/gimpgradient.[ch]
	* app/gimppattern.[ch]: all derived from GimpData now.

	* app/gimpbrushgenerated.[ch]
	* app/brush_select.c
	* app/brushes.c
	* app/gimpbrushpipe.c
	* app/gradient_editor.c
	* app/gradients.c
	* app/patterns.c: removed lots of code duplication due to common
	file save magic.

	The gradient file format has changed: it now contains the
	gradient's name (no more ugly underscores). The files have the
	extension ".ggr".

	* app/gimpgradient.[ch]: save new gradients, load new and old
	gradients.

	* data/gradients/*: removed all old gradients and added the new
	ones.