[sane-devel] .desc file for Medion/Tevion backend

[Frank Zago]

> I don't know, whether the feature freeze also prohibits new .desc files, but
> for the case that it doesn't, could someone please have a look at the
> attached file and maybe add it to CVS?

Since it's a doc file, I've added it. I changed the status to alpha and
commented the manpage entry.
It's in doc/descriptions-external/ now.

Frank.