title: how to make REFrostedViewController work with UINavigationController
body: <p>I am using <strong>REFrostedViewController</strong> library to show side bar menu in my project, which has a tableview to show the content. </p>
  
  <p>When the table cell is selected, I want to show a new page. I want to use UINavigationController to push a new view on top. But it seems that there is no UINavigationController stack in REFrostedViewController context.</p>
  
  <p>How can I achieve UINavigationController behavior to work with REFrostedViewController?</p>