Mon Aug 31 16:33:11 CDT 1998  Larry Ewing  <lewing@gimp.org>

 	* app/gimpimage.[ch]
	* app/gimage_cmds.[ch]
	* app/layers_dialog.c: Added merge down procedure, I'm not really
	sure if this behaves the way people expect it to, so please send
	me any comments on what it actually should do.  It also needs a
	little testing, especially the pdb call.

	* app/gimpimage.c: cleaned up Seth's merge commit a little. Also
	changed the mode of a merged layer to normal, as this seems to be
	the proper thing.  Discussion is welcome here as well.