Sun Feb 14 20:43:55 GMT 1999  Austin Donnelly  <austin@gimp.org>

	* app/channels_dialog.c: don't #include resize.h - it's not needed
	* app/preferences_dialog.c: ditto.

	* app/resize.c: do all dialog creation here to factor out lots of
	     common code in commands.c and layers_dialog.c.  Also cancel
	     resize/scale dialog on destruction/removal of images/layers -
	     proper fix for Peter Teichman's bug.
	* app/resize.h: new prototype for resize_widget_new() - beginnings
	     of resolution-aware scaling.
	* app/commands.c: pull all the resize/scale dialog creation stuff
	     out to resize.c
	* app/layers_dialog.c: same again.

	* app/layer.c: add REMOVED signal, sent when a layer is removed
	     from an image.  Layers typically aren't destroyed until their
	     undo info expires.
	* app/layer.h: prototype for layer_removed() call.
	* app/gimpimage.c: send out removed signal.