Flask-dance

------------------
* ``OAuth1SessionWithBaseURL`` has been renamed to ``OAuth1Session``. The old
name still exists as an alias, for backwards compatibility.
* ``OAuth2SessionWithBaseURL`` has been renamed to ``OAuth2Session``. The old
name still exists as an alias, for backwards compatibility.
* You can now pass a ``user`` or ``user_id`` object to ``blueprint.load_token``.
* ``OAuth1Session`` and ``OAuth2Session`` now store a reference to the blueprint,
so that you can also call ``session.load_token``, which is proxied to the
blueprint. This method also takes ``user`` or ``user_id`` arguments.

------------------
* Renamed ``assign_token_to_session`` to ``load_token``
* Added a ``from_config`` dict to OAuthConsumerBlueprint objects. The info
in that dict is used to dynamically populate information on the blueprint
at runtime from the configuration of the app that the blueprint is bound to.
Also set up sensible configuration variable names for the pre-set
configurations.
* If neither ``redirect_url`` nor ``redirect_to`` are specified, default to
redirecting the user to the root of the website (``/``). Previously,
specifying one of these two options was required.

------------------
* Added a the Google pre-set configuration.

------------------
* Added a new ``session_class`` parameter, so that you can specify a custom
requests.Session subclass with custom behavior.

------------------
* Changed ``OAuthConsumerMixin.created_on`` to ``OAuthConsumerMixin.created_at``,
to reflect the fact that it is a DateTime, not a Date. If you are upgrading
from an older version of Flask-Dance and using ``OAuthConsumerMixin``,
this will require a database migration.

------------------
* Renamed ``OAuthMixin`` to ``OAuthConsumerMixin``