title: RobbieHanson's XMPPFramework didReceiveMessage not called
body: <p>I'm developing on iOS and using Robbie Hanson XMPPFramework. The method didReceiveMessage is never called.</p>
  
  <p>I did successfully connect, and sent 'presence' (confirmed by using NSLog. That can be confirmed by the Openfire admin panel which shows the user as green and connected. </p>
  
  <pre><code>    XMPPPresence* presence = [XMPPPresence presence]; // type="available" is implicit
  [[self xmppStream] sendElement:presence];
  </code></pre>
  
  <p>Further, I received didReceiveIQ calls. I do not know what is IQ and do I need to handle it? </p>
  
  <p>The most important thing is do I make didReceiveMessage get called. Thanks!</p>