Change handle_response to authrized_response
Prefer authorized_response instead of @authorized_handler in example
Implement token revocation endpoint

Implements the OAuth2 [token revocation endpoint](https://oauthlib.readthedocs.org/en/latest/oauth2/endpoints/revocation.html).
Check ownership

Adding an ownership check plus adding client_id and user to request.
Add tests for revoke endpoint
Update documentation
Use correct var for setting client_id and user plus trigger the decorated function after processing
Stylefix for #131
Use authorized_response in documentation