sf4 resolve errors and depreciations

Templating/ChillTwigRoutingHelper.php

@@ -21,6 +21,7 @@
 namespace Chill\MainBundle\Templating;
 
 use Twig\Extension\AbstractExtension;
+use Twig\Node\Node;
 use Twig\TwigFunction;
 use Twig\TwigFilter;
 use Symfony\Component\HttpFoundation\RequestStack;
@@ -72,7 +73,7 @@ class ChillTwigRoutingHelper extends AbstractExtension
         ];
     }
     
-    public function isUrlGenerationSafe(\Twig_Node $argsNode)
+    public function isUrlGenerationSafe(Node $argsNode)
     {
         return $this->originalExtension->isUrlGenerationSafe($argsNode);
     }