added node modules back to the example bot, so it exports with the required modules

example_bot/node_modules/ws/index.js

@@ -0,0 +1,13 @@
+'use strict';
+
+const WebSocket = require('./lib/websocket');
+
+WebSocket.createWebSocketStream = require('./lib/stream');
+WebSocket.Server = require('./lib/websocket-server');
+WebSocket.Receiver = require('./lib/receiver');
+WebSocket.Sender = require('./lib/sender');
+
+WebSocket.WebSocket = WebSocket;
+WebSocket.WebSocketServer = WebSocket.Server;
+
+module.exports = WebSocket;