https://github.com/php-fig/http-message-util
https://github.com/zumba/json-serializer
Server side handling class for FIDO U2F registration and authentication
https://github.com/code-lts/U2F-php-server
https://github.com/kward/shunit2
https://github.com/trentrichardson/jQuery-Timepicker-Addon