title: import com.microsoft.windowsazure.messaging.*; is not detected. Which library should i add in android studio?
body: <p>I am using azure notification hub in my android app.
  after following all procedures i am getting an error.</p>
  
  <pre><code>import com.microsoft.windowsazure.messaging.*;
  </code></pre>
  
  <p>is not detected.
  and  <code>private NotificationHub hub;</code> is not getting declared</p>
  
  <p>Am i missing some library?</p>