title: How to upgrade my iOS4 app to iOS6
body: <p>I have an iOS 4 app in the app store.  I understand on the iPhone 5, the UI will be taller and my app will appear inside a letter box.</p>
  
  <p>I cannot find any documentation about what's necessary to upgrade the app.  Does anyone know wher I can find an "upgrading to iOS6" document / guide?!
  thanks</p>