add howto page

src/Wallabag/CoreBundle/Controller/StaticController.php

@@ -7,6 +7,16 @@ use Symfony\Bundle\FrameworkBundle\Controller\Controller;
 
 class StaticController extends Controller
 {
+    /**
+     * @Route("/howto", name="howto")
+     */
+     public function howtoAction()
+     {
+         return $this->render(
+             'WallabagCoreBundle:Static:howto.html.twig',
+             array()
+         );
+     }
     /**
      * @Route("/about", name="about")
      */