errors when attempting to issue a print command (e.g., trying to use
"lpr", but that command is not available) should appear in Tux Paint.
(SourceForge bug #2205528)
PostScript printing now uses libprint to determine papersize, and scale and
position image accordingly. Thanks to Henry House.
"--papersize" option added to allow PostScript printing code to use a
different size than libpaper reports as the user's or system's default.
