Comment 2 for bug 848827

It would appear to be a result of using Launchpad to host the
lazr.restfulclient downloads. The LP download page is batched and
setuptools/distribute don't spider the target of the PyPI "Download URL"
link (thank goodness). The 0.16.0 release was pushed off the first page
of downloads so it is no longer available.

In the short run I will set lazr.restfulclient to use a newer
lazr.restful. In the long run we should change the way downloads are
presented if we want people to use LP to host Python packages.
Otherwise we should move the lazr package downloads to PyPI.