title: Should I subclass UIPageViewController?
body: <p>What's the preferred way to use UIPageViewController? </p>
  
  <ol>
  <li><p>Subclass UIPageViewController and also use that object as the datasource for itself?</p></li>
  <li><p>Create a container VC and add a UIPageViewController as its child VC? (having the container VC be the data source)</p></li>
  </ol>
  
  <p>Pros/Cons to either approach would be appreciated.</p>