authentic2/templates: add a block around the navigation menu and hide it on the login page

authentic2/templates/authentic2/base.html

@@ -33,6 +33,7 @@
           </ul>
           {% endif %}
         {% endblock %}
+	{% block nav %}
         {% if user.is_authenticated %}
         <div id="nav">
           <p>Bonjour {{ user.get_full_name }}</p>
@@ -59,6 +60,7 @@
           </ul>
         </div>
         {% endif %}
+	{% endblock %}
         <div id="main-content">
           {% block content %}{% endblock %}
         </div> <!-- main-content -->

authentic2/templates/authentic2/login.html

@@ -15,8 +15,10 @@
 <script type="text/javascript" src="{{ STATIC_URL }}jquery/js/jquery.simplemodal.js"></script>
 {% endblock %}
 
-{% block content %}
+{% block nav %}
+{% endblock %}
 
+{% block content %}
 <div id="info-box">
   <h1>Connexion</h1>
 </div>