title: Move to another storyboard without a UINavigationController
body: <p>I've got two storyboards. I found some code on how I can instantiate the initial View Controller of another Storyboard and move (or do you say segue?) to that. But those examples used a Navigation Controller. The user shouldn't be able to go back to the previous Storyboard in my case (login page). The app can forget about the old Storyboard, it's not needed ever again when I move over to the new one.</p>
  
  <p>So the View Controller on top of the hierarchy in the first Storybard can be forgotten about, I don't want it to be the presenter of the next Storyboard. It shouldn't exists, the presenter and top of hierarchy should now be the initial View Controller of the second Storyboard.</p>
  
  <p>How can I do this?</p>