title: Refreshing Items in wheelnav.js
body: <p>I'm using the excellent wheelnav.js but i am having trouble getting the icons to update</p>
  
  <p>I originally have 2, but want it update based on a selection.  The number of items is determined by a variable that will change.  So to start with I have (some stuff omitted for clarity)...</p>
  
  <pre><code>var wheelIcons = [icon.apple, icon.android];
  mainNavWheel = new wheelnav('mainNavWheel');
  mainNavWheel.createWheel(wheelIcons)
  </code></pre>
  
  <p>works perfectly, but on the click of a button i want to update the number of items...</p>
  
  <pre><code>function setWheelItems(){
          wheelIcons = [icon.font, icon.resize2, icon.lock, icon.star, icon.pallete];
      mainNavWheel.refreshWheel();
      console.log("set wheel items");
  }
  </code></pre>
  
  <p>I know the function gets called due to my console log, but nothing happens to the wheel.  Am I missing something really obvious to get the number of items to update ??</p>
  
  <p>many thanks</p>