title: Exclamation Mark in Backbone Router routes
body: <p>In our project we have a bunch of routes such that the original route: routeAction is followed by !route: routeAction like so.. </p>
  
  <pre><code>'home': 'homeAction',
  '!home': 'homeAction',
  </code></pre>
  
  <p>No one on the team knows why we do this. Anyone here know? Can't find anything in the documentation about it.  </p>