Importer/Exporter for MODS format

[tschechlovdev]

Since JabRef has an exporter for the MODS format, it would be nice to have also an importer for this format.
There is a XML schema available here, so I think it would be the best to write the importer with a JAXB parser.
But then it could happen, that exporting in MODS format and importing in MODS format are not working correctly. So I think the exporter should also be rewritten with a JAXB parser.

If there are no arguments against it, I would take care of this.

[koppor]

+1

[boceckts]

I will close this as everything seems to be done.