Add support for removing duplicate objects in pdfclean.
Add support for removing duplicate objects in pdfclean.

Ignore-this: 8ebf8a4e82ad6fc7b02bb689adadbcfe

darcs-hash:20100715151506-86a4e-ea8de89b94335995d40be0c0e65ea46ed9a078ad.gz

nqv/mupdf,nqv/mupdf,nqv/mupdf,nqv/mupdf,nqv/mupdf,nqv/mupdf