title: rescue_from ActionController::RoutingError in Rails 4
body: <p>I've got the following error:</p>
  
  <pre><code>ActionController::RoutingError (No route matches [GET] "/images/favicon.ico")
  </code></pre>
  
  <p>I want to show error404 page for links that are not existing.</p>
  
  <p>How can I achieve that?</p>