title: UITableViewController tableView Header in IB
body: <p>I have searched, and can find nothing to explain this. I can't be the first to have this issue...
  Takin' about a tableView header and footer here, NOT section header.</p>
  
  <p>Created a UITableViewController with XIB.
  Added a UIView as a header to the tableView in IB. I've done this a hundred times before when the tableView was added to a UIViewController instead of wrapped in a UITableViewController.
  When I build, the header view does not appear.
  If I roll-my-own header UIView in the viewDidLoad, it does appear.</p>
  
  <p>So, I moved the header UIView to the root level of the XIB file. Hooked it up to an IBOutlet property.
  Assign it to self.tableView in the viewDidLoad. Nothing.
  In fact, the header UIView is nil. It's like it doesn't really load from the nib.</p>
  
  <p>Ideas?</p>