Previously we were generating API keys deterministically using a hash
of the user's email address; this is clearly not a good long-term
approach.
(imported from commit 14d0c7c9edbc45b3ae1d17a43765ad9726338d4d)
See PEP 328[1] for details. This feature was introduced in Python 2.5 and
will become mandatory in Python 3.
[1]: http://www.python.org/dev/peps/pep-0328
(imported from commit 7444eeba8a08d5f91b94c7921848f2274979bd76)
