Log Message:
Updated py-requests-oauthlib to 0.7.0.

v0.7.0 (22 September 2016)
++++++++++++++++++++++++++

- Allowed ``OAuth2Session.request`` to take the ``client_id`` and
  ``client_secret`` parameters for the purposes of automatic token refresh,
  which may need them.

v0.6.2 (12 July 2016)
+++++++++++++++++++++

- Use ``client_id`` and ``client_secret`` for the Authorization header if
  provided.
- Allow explicit bypass of the Authorization header by setting ``auth=False``.
- Pass through the ``proxies`` kwarg when refreshing tokens.
- Miscellaneous cleanups.

v0.6.1 (19 February 2016)
+++++++++++++++++++++++++

- Fixed a bug when sending authorization in headers with no username and
  password present.
- Make sure we clear the session token before obtaining a new one.
- Some improvements to the Slack compliance fix.
- Avoid timing problems around token refresh.
- Allow passing arbitrary arguments to requests when calling
  ``fetch_request_token`` and ``fetch_access_token``.

v0.6.0 (14 December 2015)
+++++++++++++++++++++++++

- Add compliance fix for Slack.
- Add compliance fix for Mailchimp.
- ``TokenRequestDenied`` exceptions now carry the entire response, not just the
  status code.
- Pass through keyword arguments when refreshing tokens automatically.
- Send authorization in headers, not just body, to maximize compatibility.
- More getters/setters available for OAuth2 session client values.
- Allow sending custom headers when refreshing tokens, and set some defaults.