title: Dynamically change the itemWidth of a flexslider
body: <p>I have a <a href="http://www.woothemes.com/flexslider/" rel="nofollow">flexSlider</a> initialized like this:</p>
  
  <pre><code>$('.flexslider').flexslider({
      itemWidth: width
  });
  </code></pre>
  
  <p>Is it somehow possible to dynamically change the <code>itemWidth</code> after the initialization and force a refresh so that the new value is applied?</p>