title: add background image to UITableViewController in Navigation based app
body: <p>I have a navigation based app where I push <code>UITableViewControllers</code> onto the stack.  I would like to add a background <code>UImage</code> to all of my <code>UITableViewControllers</code>.  Not a <code>UIColor</code>, but an <code>UImage</code>.  I know how I can do this using a <code>Nib</code> file and setting the <code>UITableView</code> itself to have use <code>[UIColor ClearColor]</code>, but I don't want to go through all my <code>UITableViewControllers</code> and change them to using <code>Nib</code> files, etc.  </p>
  
  <p>I also found <a href="http://howtomakeiphoneapps.com/2009/03/how-to-add-a-nice-background-image-to-your-grouped-table-view/" rel="nofollow noreferrer">this solution</a> which would be great if I was just using a single tableviewcontroller in my app.  I think there might be a way to make this work, by adding a subview "below" my table view that is created by default in a <code>UITableViewController</code>?  </p>
  
  <p>Any suggestions would be great.</p>