title: Can't set UINavigationItem title programmatically
body: <p>I set up my app using a storyboard and have my main view controller embedded in a <code>UINavigationControler</code>.  To change the title that appears in the navigation bar, in the <code>viewDidLoad</code> method of my main view controller, I have <code>self.navigationItem.title = @"My Title";</code> But the title never gets set.</p>
  
  <p>My guess is that I need to set up a Reference Outlet in my storyboard, but I'm not sure what needs to be connected to what.  Any ideas?</p>