title: What is a shoebox app?
body: <p>This is taken from the OSX iCloud Storage reference document:</p>
  
  <blockquote>
    <p>If you're writing a shoebox app, on the other hand, you should not use
    NSDocument. So if you're doing a shoebox app, you must implement your
    own file presenter and deal with version conflicts through that API.</p>
  </blockquote>
  
  <p>What is a shoebox app?</p>