title: Update knockoutjs viewmodel when dom text changes
body: <p>I need the underling data to be updated when the bound table cell text is updated.</p>
  
  <p>What do I need to do to make the update work?</p>
  
  <p>example : <a href="http://jsfiddle.net/2hdRp/1/" rel="nofollow">http://jsfiddle.net/2hdRp/1/</a></p>