Apply the JS minification only in non-debug mode

Author: javiereguiluz

app/Resources/views/base.html.twig

@@ -134,7 +134,7 @@
 
         {% block javascripts %}
         {# uncomment the following lines to combine and minimize JavaScript assets with Assetic
-            {% javascripts filter="jsqueeze" output="js/app.js"
+            {% javascripts filter="?jsqueeze" output="js/app.js"
                 "assets/js/jquery-2.1.3.js"
                 "assets/js/bootstrap-3.3.4.js"
                 "assets/js/highlight.pack.js" %}