implement the ps exporter interface for tiff documents

implement the ps exporter interface for tiff documents

2005-07-03  Matthew S. Wilson  <msw@rpath.com>

	* tiff/tiff-document.c (tiff_document_ps_export_begin)
	(tiff_document_ps_export_do_page, tiff_document_ps_export_end)
	(tiff_document_document_ps_exporter_iface_init): implement the ps
	exporter interface for tiff documents

	* tiff/tiff2ps.c: added a modified version of tiff2ps.c from
	libtiff to implement TIFF postscript export

	* tiff/tiff2ps.h: added a header file for external tiff2ps
	functions.

	* tiff/Makefile.am (libtiffdocument_la_SOURCES): add tiff2ps.c and
	tiff2ps.h