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

node_modules/express/index.js

@@ -0,0 +1,11 @@
+/*!
+ * express
+ * Copyright(c) 2009-2013 TJ Holowaychuk
+ * Copyright(c) 2013 Roman Shtylman
+ * Copyright(c) 2014-2015 Douglas Christopher Wilson
+ * MIT Licensed
+ */
+
+'use strict';
+
+module.exports = require('./lib/express');