title: Default sort versions with papertrail
body: <p>I'm using the paper_trail gem in my Rails 4 application and I want to set a default sort order. papertrail doesn't have a model, only a controller and an initializer.</p>
  
  <p>Where can I put it? Do I have to create a model for it?</p>
  
  <pre><code>default_scope order('created_at DESC')
  </code></pre>