add a "view page" for event

ref #3

Resources/views/layout.html.twig

@@ -25,7 +25,7 @@
 {% endblock %}
 
 {% block layout_wvm_content %}
-    {% block event_content %}}<!-- block event content empty -->
+    {% block event_content %}<!-- block event content empty -->
         <h1>{{ 'Event' |trans }}</h1>
     {% endblock %}
 {% endblock  %}