Remove localtunnel integration

[naholyr]

localtunnel has not been very reliable during tests, so it may be a good idea to just remove it. However, it brings some issues:

• Client-side must be modified when using a tunnel, so we have to add a test in client to drop websocket support when using such tunnel:

  copycast/client/drivers/cycle-socket.io.js

  Lines 5 to 8 in 3b628a6

  	if (document.location.hostname.match(/(\.localtunnel\.me|\.ngrok\.io)$/)) {
  	// Websocket transports screws the whole thing when tunnelling through localtunnel
  	socketOptions = { transports: ['polling'] }
  	}

  • Solution would be to just drop websocket support when hostname is not an IP address?
  • Maybe upgrading to socket.io 2.x would fix it
• Tunnel's hostname is an interesting thing to store so we can reuse it when restarting, in our localtunnel integration we just let it be randomly generated first time then store it in a file to reuse the same one on next starts: user doesn't have to choose a hostname, but does not lose the permanent url
  • I think we can just drop this and have user use his tunnel tool and choose himself the hostname if he wants it to be permanent, useless feature imo