title: Chat application using Pubnub
body: <p>I am developing chat application using <code>Pubnub</code>.
  I have successfully created group chat using <code>Publish/subscribe</code>. </p>
  
  <p>Now I want to develop one-one chat using <code>Pubnub</code>. I am trying using <code>PnGcmMessage</code> but chat not working.</p>
  
  <p>If anyone knows this, please help me !!</p>