News:
- Supports RP-initiated logout according to [Section 5 of OpenID Connect Session Management](http://openid.net/specs/openid-connect-session-1_0.html#RPLogout).
- Includes [example application](https://github.com/its-dirg/pyop/tree/master/example) that can be run as a testing OP.
Fixes:
- Fixed broken logging calls.
- Include proper imports in examples in README.
Improvements:
- Upgraded pyoidc dependency.