tiddlywebplugins.openid2 0.9

This is an OpenID challenger for TiddlyWeb that replaces the one that
was originally included in the core TiddlyWeb package. It improves on
that one by using the python-openid package, thus supporting OpenID 2
and improved discovery mechanisms.

To use, add 'tiddlywebplugins.openid2' to auth_systems via
tiddlywebconfig.py. The following example replaces all existing
auth_systems with just openid.

config = {
'auth_systems': ['tiddlywebplugins.openid2'],
}