* app/app_procs.c: free the brush dialog before freeing the brushes.

	* app/blend.c, app/bucket_fill.c: don't include brush_select.h

	* app/brush_select.[ch]: add the ability to delete generated brushes.

	* app/gimpbrushgenerated.c: save the brush parameters on seperate lines.

	* app/gimpbrushlist.c: make sure we don't overwrite other brush
	files when saving newly created brushes.