Import agent records from the LCNAF webservice

A plugin!

@lcdhoffman: We're importing agents using the standard MarcXML converter, and we notice that nothing is coming through for the "source" parameter on agent names.  Should we be importing something into the incoming MarcXML to set its source to LCNAF?  A quick read of the LOC site suggested ind2 of the 700 field might be related, but we weren't sure.  Any tips?

Thanks,
Mark