title: iOS 6 - viewDidUnload migrate to didReceiveMemoryWarning?
body: <p>So with <code>viewDidUnload</code> deprecated as of iOS 6, what do I need to do now?</p>
  
  <p>Delete it, and migrate all of it's contents in <code>didReceiveMemoryWarning</code>, or leave it, and don't do anything in <code>didReceiveMemoryWarning</code>?</p>