Page objects for PAGES already contain the proper url attribute.

Having the templates with /pages/ causes the generated links to be
wrong.

mnmlist/templates/base.html

@@ -30,7 +30,7 @@
             <nav>
                 <ul>
                 {% for page in PAGES %}
-                    <li><a href="{{ SITEURL }}/pages/{{ page.url }}">{{ page.title }}</a>{% if not loop.last %} ::{% endif %}</li>
+                    <li><a href="{{ SITEURL }}{{ page.url }}">{{ page.title }}</a>{% if not loop.last %} ::{% endif %}</li>
                 {% endfor %}
                 {% if categories|length > 1 %}
                     <li>:: <a href="{{ SITEURL }}/categories.html">Catégories</a></li>