Requests-oauthlib

+++++++++++++++++++
- Fix ``TypeError`` being raised instead of ``TokenMissing`` error.
- Raise requests exceptions on 4XX and 5XX responses in the OAuth2 flow.
- Avoid ``AttributeError`` when initializing the ``OAuth2Session`` class
without complete client information.

++++++++++++++++++++++++
- New ``authorized`` property on OAuth1Session and OAuth2Session, which allows
you to easily determine if the session is already authorized with OAuth tokens
or not.
- New ``TokenMissing`` and ``VerifierMissing`` exception classes for OAuth1Session:
this will make it easier to catch and identify these exceptions.

++++++++++++++++++++
- New install target ``[rsa]`` for people using OAuth1 RSA-SHA1 signature
method.
- Fixed bug in OAuth2 where supplied state param was not used in auth url.
- OAuth2 HTTPS checking can be disabled by setting environment variable
``OAUTHLIB_INSECURE_TRANSPORT``.
- OAuth1 now re-authorize upon redirects.
- OAuth1 token fetching now raise a detailed error message when the
response body is incorrectly encoded or the request was denied.
- Added support for custom OAuth1 clients.
- OAuth2 compliance fix for Sina Weibo.
- Multiple fixes to facebook compliance fix.
- Compliance fixes now re-encode body properly as bytes in Python 3.
- Logging now properly done under ``requests_oauthlib`` namespace instead
of piggybacking on oauthlib namespace.
- Logging introduced for OAuth1 auth and session.

++++++++++++++++++++++++++
- OAuth1Session methods only return unicode strings. 55.
- Renamed requests_oauthlib.core to requests_oauthlib.oauth1_auth for consistency. 79.
- Added Facebook compliance fix and access_token_response hook to OAuth2Session. 63.
- Added LinkedIn compliance fix.
- Added refresh_token_response compliance hook, invoked before parsing the refresh token.
- Correctly limit compliance hooks to running only once!
- Content type guessing should only be done when no content type is given
- OAuth1 now updates r.headers instead of replacing it with non case insensitive dict
- Remove last use of Response.content (in OAuth1Session). 44.
- State param can now be supplied in OAuth2Session.authorize_url