[provenance-challenge] opm2dot: visualisation of opm graphs

[Luc Moreau]

All,
One of the purposes of a common provenance format is to be able to share 
tools!
Here, we go! Hopefully, the first of a long series.

Find at
http://openprovenance.org/java/maven-snapshots/org/openprovenance/opm/1.0-SNAPSHOT/opm-1.0-20090410.183312-4-opm2dot-assembly.zip
a converter of opm to dot (and pdf).  It comes with a few examples of 
conversion and
configuration. I thought that some of you may find it useful.
Feel free to modify and improve it!

Cheers,
Luc