title: How do I get a Row count from a UITableView
body: <p>I have a tableview I'd like to customize based on how many rows it has.</p>
  
  <p>If it has no rows, I'd like the background image to prompt the user to add content.
  If it has 1 or more rows, I'd like it to have a different background image, in order to display the content.</p>
  
  <p>I'm using a fetched results controller to populate my tableview, by the way.</p>
  
  <p>Any ideas?</p>