Small extension for issue #190

[lemzwerg]

Sorry for the very long delay in answering your question. The patch for issue #190 works just fine, thanks! However, I suggest a minor addition to the phrasing of the advice to use gs. Right now we have

Optimization enabled: remember to run
   'gs -q -dBATCH -dNOPAUSE -sDEVICE=pdfwrite -sOutputFile=foo-final.pdf foo.pdf'.

which should become

Optimization enabled: Remember to run
   'gs -q -dBATCH -dNOPAUSE -sDEVICE=pdfwrite -sOutputFile=foo-final.pdf foo.pdf'
to produce the final output file.  You should also set the
GS_FONTPATH environment variable if necessary
to make ghostscript find your LilyPond fonts.

or something similar.