WIP - Nastenka integration

assets/javascript/js.cookie.min.js

assets/javascript/nastenka_sync.js

ext/eparsons/restapi/ErrorResponse.php

ext/eparsons/restapi/Validation.php

ext/eparsons/restapi/composer.json

ext/eparsons/restapi/config/routing.yml

ext/eparsons/restapi/config/services.yml

ext/eparsons/restapi/controller/auth/Authentication.php

ext/eparsons/restapi/controller/forums/Forums.php

ext/eparsons/restapi/controller/users/Users.php

ext/eparsons/restapi/event/event_listener.php

ext/eparsons/restapi/license.txt

nastenka_sync.php

styles/all/template/nastenka_sync.html