title: Transitioning to landscape rotation within a uinavigationcontroller
body: <p>I want to push a landscape view from within a uinaviagtioncontroller, whose initial view is in portrait...
  So you click a button, or tableviewcell, and the screen rotates 90° into the new view..</p>
  
  <p>How would I manage that? This is similar to how the Youtube app works when transitioning from movie info screen to the actual movie.</p>
  
  <p>(note: i am not interested in what rotation the user is holding the device)</p>