Custom templates to correctly display 404 and 500 errors.

see #356

modoboa/templates/404.html

@@ -0,0 +1,4 @@
+{% extends "layout_simple.html" %}{% load i18n %}
+{% block content %}
+<p class="well">{% trans "The requested page does not exist." %}</p>
+{% endblock %}

modoboa/templates/500.html

@@ -0,0 +1,4 @@
+{% extends "layout_simple.html" %}{% load i18n %}
+{% block content %}
+<p class="well">{% trans "An internal error occured." %}</p>
+{% endblock %}

modoboa/templates/layout_simple.html

@@ -0,0 +1,22 @@
+<!DOCTYPE html>
+<html lang="{{ LANGUAGE_CODE }}">
+  <head>
+    <meta charset="utf-8" />
+    <title>{% block pagetitle %}{% endblock %}</title>
+    <link rel="icon" type="image/png" href="{{ STATIC_URL }}css/logo-icon.png" />
+    <link rel="stylesheet" type="text/css" href="{{ STATIC_URL }}css/bootstrap.css" />
+    <link rel="stylesheet" type="text/css" href="{{ STATIC_URL }}css/bootstrap-responsive.css" />
+    <script src="{{ STATIC_URL }}js/bootstrap.js" type="text/javascript"></script>
+    <script src="{{ STATIC_URL }}js/bootstrap-datepicker.js" type="text/javascript"></script>
+    {% url django.views.i18n.javascript_catalog as catalog_url %}
+    <script type="text/javascript" src="{{ catalog_url }}"></script>
+  </head>
+
+  <body>
+    <div class="container-fluid">
+      <div class="row-fluid">
+        {% block content %}{% endblock %}
+      </div>
+    </div>
+  </body>
+</html>