storage: drop hub

Obsolete and no longer needed.

Signed-off-by: Richard Marko <rmarko@fedoraproject.org>
webui: drop obsolete and unused TransactionMiddleware

Signed-off-by: Richard Marko <rmarko@fedoraproject.org>
webui: set session serializer to pickle

required to work around
Exception Value: <openid.yadis.manager.YadisServiceManager object at
0x7fd2f43b2250> is not JSON serializable
https://bugs.launchpad.net/django-openid-auth/+bug/1252826

Signed-off-by: Richard Marko <rmarko@fedoraproject.org>
webui: add logout url

Signed-off-by: Richard Marko <rmarko@fedoraproject.org>