title: value binding in KnockoutJs fails for select when having complex types
body: <p>I am trying to use the value binding on the select element, as described in this fiddle: <a href="http://jsfiddle.net/MikeEast/nM6dd/2/">http://jsfiddle.net/MikeEast/nM6dd/2/</a></p>
  
  <p>However, I cannot seem to be able to set the selected option (value binding).</p>
  
  <p>I know I can use the optionsValue binding, but that makes the value a string instead of an object which is not preferable. If that is the only way to go, how would I do to ensure that the selected option is written back to the view model?</p>
  
  <p>Thanks!</p>