push should push to dgit remote (other branches)
manpage should say not to push to suite branches
newly cloned repos should have suite branches marked not to push

Cope with outside-main things (rmadison does not print pool path)

Cope with non-Debian archives

Make it possible to do dgit clone / fetch anonymously

Archive agility.  Archive needs to specify (a) way to get versions
and paths in archive for dscs (b) unpriv pull location (c) priv
push location

Support Format 3.0 (quilt)

Push access for DMs.

Have option to do fake merge thing.