get SHA1 hash

No, I thought I would extend the ws module and make it cover both the client and server.

So we can use it like:

/// Client
var WebSocket = require("ws");
 var ws = new WebSocket("HOST",{
      port: 8080,
      protocolVersion: 13,
      origin: 'Espruino',
      keepAlive: 60  // Ping Interval in seconds.
    });enter code here

/// Server
var WebSocketServer = require("ws").Server;
 var wss = new WebSocketServer({port: 8080});
 wss.on('connection', function(ws) {
  ws.on('message', function(message) {
    bla bla
  });

And thats why I wanted a way to only require the sha1 function if I am creating a server but for the client I really don't need it.