title: Add explanatory text to UITableView like Things.app
body: <p>Could anybody hazard a guess as to how exactly the explanatory text was added to the blank state Today screen in the <a href="http://culturedcode.com/things/iphone/" rel="nofollow noreferrer"><strong>Things</strong></a> to-do list iPhone app? Is it a background image or a view that somehow sits in front of the <code>UITableView</code>?</p>
  
  <p>Thanks in advance.</p>
  
  <p><img src="https://i.stack.imgur.com/VARQM.png" alt="A screenshot of the Things Today screen"></p>