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

node_modules/gauge/progress-bar.js

@@ -0,0 +1,35 @@
+'use strict'
+var validate = require('aproba')
+var renderTemplate = require('./render-template.js')
+var wideTruncate = require('./wide-truncate')
+var stringWidth = require('string-width')
+
+module.exports = function (theme, width, completed) {
+  validate('ONN', [theme, width, completed])
+  if (completed < 0) completed = 0
+  if (completed > 1) completed = 1
+  if (width <= 0) return ''
+  var sofar = Math.round(width * completed)
+  var rest = width - sofar
+  var template = [
+    {type: 'complete', value: repeat(theme.complete, sofar), length: sofar},
+    {type: 'remaining', value: repeat(theme.remaining, rest), length: rest}
+  ]
+  return renderTemplate(width, template, theme)
+}
+
+// lodash's way of repeating
+function repeat (string, width) {
+  var result = ''
+  var n = width
+  do {
+    if (n % 2) {
+      result += string
+    }
+    n = Math.floor(n / 2)
+    /* eslint no-self-assign: 0 */
+    string += string
+  } while (n && stringWidth(result) < width)
+
+  return wideTruncate(result, width)
+}