* libgimp/gimpexport.c: if format arg is "silent", export
	without popping a dialog -- saves duplicating code.

	* plug-ins/print/print-draw-page.c
	* plug-ins/print/print-draw-page.h
	* plug-ins/print/print-page-layout.c
	* plug-ins/print/print-page-layout.h
	* plug-ins/print/print-settings.c
	* plug-ins/print/print-settings.h
	* plug-ins/print/print.h:         new files

	* plug-ins/print/Makefile.am
	* plug-ins/print/print.c:  modified

	Progress toward GtkPrintOperation plug-in.  Should already
	be usable, but very ugly.