Order stylesheets in base.html

In order for overrides to work the expected way, go from the most
general down to the specific: upstream < app.css (theme) < itou.css
(overrides).

itou/templates/layout/base.html

@@ -34,8 +34,8 @@
         <meta property="twitter:image" content="{{ ITOU_PROTOCOL }}://{{ ITOU_FQDN }}{% static "img/logo_metatags.png" %}">
 
         <link rel="shortcut icon" href="{% static_theme_images "favicon.ico" %}" type="image/ico">
-        <link rel="stylesheet" href="{% static "vendor/theme-inclusion/stylesheets/app.css" %}">
         <link rel="stylesheet" href="{% static "vendor/easymde/easymde.min.css" %}">
+        <link rel="stylesheet" href="{% static "vendor/theme-inclusion/stylesheets/app.css" %}">
         <link rel="stylesheet" href="{% static "css/itou.css" %}">
         {% block extra_head %}{% endblock %}
     </head>