Turris-auth version 0.2.0

Added
* alert about insecure connection
* opportunistic redirect to HTTPS from HTTP

Changed
* magnet module is switched to fastcgi and everything is migrated to use that
* server now returns 401 error code when X-Requested-With header is send
* project is now named only turris-auth as it no longer is essentially
  dependent on Lighttpd
* website style migrated to the bootstrap version 4.6.0