- add the ability to supress starting our own OO and connect to one running
  elsewhere

- OpenOffice.pm: image converter seems to be leaving behind images in /tmp...
                 Archive::Zip?

- auto-convert non-web images to jpg/gif/png?

- wvWare/other backends besides OO and poppler: handle images?

- OpenOffice.pm: poll via UNO to determine readiness rather than sleep (or not)

- OpenOffice.pm: convert DocumentConverter.py to Perl using OpenOffice::UNO