title: primefaces openDialog issue
body: <p>I am working on primeface, Dialog framework.</p>
  
  <p>but there are no such methods like <code>openDialog</code> or <code>closeDialog</code>.</p>
  
  <p>I'm using:</p>
  
  <pre><code>RequestContext.getCurrentInstance().openDialog("viewCars", options, null);  
  </code></pre>
  
  <p>but there is no such method. I am using latest library of primefaces, i.e., 4.0.</p>