Added the jQuery CDN for taskmaster sample

Fixed the code since it wasn't loading from jQuery CDN as the doc specified. 
```javascript
<!-- Grab Google CDN's jQuery. fall back to local if necessary -->
<script src="//ajax.googleapis.com/ajax/libs/jquery/1.9.1/jquery.min.js"></script>
<script type='text/javascript'>
  window.jQuery || document.write('<script src="js/jquery.min.js">\x3C/script>')
</script>
```