Comment 6 for bug 1215959

See LP: #1220907 for what we're going to do on the server side.

On the client side, for -cli we'll just parse the version_detail field if it exists and pretty print the details. If it doesn't exist, we'll just suppress the output.

For -dbus, I will implement the .Info() method as previously described, even though some of that information is included in the UpdateAvailableStatus signal. (yay for duplication)

I'll ask Didier to decide whether he'd rather have a string returned for the version_detail and do the parsing himself, or whether he'd like the DBus API to return a dict-of-strings-to-strings.