Show django messages framework messages appear

In all site pages.

wifiwithme/apps/contribmap/templates/base.html

@@ -91,6 +91,13 @@
       </div>
     </div>
   </nav>
+{% if messages %}
+<header class="messages">
+  {% for message in messages %}
+    <div class="alert {% if message.tags %} alert-{{ message.tags }}"{% endif %}>{{ message }}</div>
+    {% endfor %}
+</header>
+{% endif %}
   <section role="main" class="container">
     {% block content %}{% endblock %}
   </section>