I think we should consider switching back to setuptools once 0.7 is released
(defined as "available on PyPI), since this will clearly be the future of this
component. We may have some fallout to deal with in other packages
(e.g. virtualenv) that depend on this, and clearly setuptools/distribute is a
central part of our stack. But it seems like now is a good time to shake that
out for Jessie.