title: PubNub client() function not working for callbacks
body: <p>Currently in Swift I have a PubNub object subscribed to a specific channel. Whenever an event happens, I can see a Logger instance being done, however none of the client() functions are receiving anything as callbacks.</p>
  
  <p>The three I have set up are:</p>
  
  <pre><code>    func client(client: PubNub!, didReceiveStatus status: PNSubscribeStatus!) 
      func client(client: PubNub!, didReceivePresenceEvent event: PNPresenceEventResult!)
      func client(client: PubNub!, didReceiveMessage message: PNMessageResult!, withStatus status: PNErrorStatus!)
  </code></pre>
  
  <p>Is there another way to receive the subscription event callback or is there something I am missing?</p>