public function indexAction($page = 1)
    {
        $reader = $this->getAuditReader();
        $revisions = $reader->findRevisionHistory(20, 20 * ($page - 1));

        return $this->render('SimpleThingsEntityAuditBundle:Audit:index.html.twig', array(
            'revisions' => $revisions,
        ));
    }