See commit messages for details.
- add Ruby on Rails Fidor API Demo Application
- add PHP advanced example
- remove client_secret usage in params => moved to BasicAuth header
- fix usage of access_token in api URLs, now set in Authorization Header
- fix proper TLS handling for node example
- make starter kits use all required oauth params: state, response_type, grant_type
- init with plain oauth examples for php, ruby, nodejs, golang, java