----------------
- Integrate the set_jwt_auth_header function into the identity policy as remember method.
- Add support for PS256, PS384, and PS512 algorithms.
- Pass settings directly as arguments to the JWTIdentityPolicy class with the possibility
to override them with Morepath settings using the method introduced in Morepath 0.11.
- Remove JwtApp as now we use JWTIdentityPolicy directly without inherit from JwtApp.
- Add a Introduction and Usage section to README.
- Integrate all functions as methods in the JWTIdentityPolicy Class.
- Refactor the test suite.