- Support for dynamic client registration (thanks to rebeckag)

- Support for some additional OpenID request params (ongoing work)
- Minor bug fixes

0.2.0 release:

- Token endpoint is now used verbatim (openid#36)
- Support for OpenID Connect display and prompt params
- Error handling in AuthState for failed authorization and token requests

0.1.1 release - fixes auth requests on devices without a default browser