euscan: add basic overlay support

Signed-off-by: Corentin Chary <corentincj@iksaif.net>

euscanwww/templates/_base.html

@@ -31,6 +31,7 @@
 	  <li><a href="{% url euscan.views.categories %}">Categories</a></li>
 	  <li><a href="{% url euscan.views.herds %}">Herds</a></li>
 	  <li><a href="{% url euscan.views.maintainers %}">Maintainers</a></li>
+	  <li><a href="{% url euscan.views.overlays %}">Overlays</a></li>
 	  <li><a href="{% url euscan.views.world %}">Scan World</a></li>
 	  <li><a href="{% url euscan.views.statistics %}">Statistics</a></li>
 	  <!--

euscanwww/templates/euscan/overlay.html

@@ -0,0 +1,12 @@
+{% extends "euscan/_datatable.html" %}
+
+{% load packages %}
+
+{% block title %}
+{{ block.super }} - Overlay: {{ overlay }}
+{% endblock %}
+
+{% block content %}
+<h2>Overlay: {{ overlay }}</h2>
+{% packages packages %}
+{% endblock %}

euscanwww/templates/euscan/overlays.html

@@ -0,0 +1,26 @@
+{% extends "euscan/_datatable.html" %}
+
+{% load packages %}
+
+{% block title %}
+{{ block.super }} - overlays
+{% endblock %}
+
+{% block content %}
+<h2>Overlays</h2>
+
+<table id="table" class="display">
+  <thead>
+    <th>Overlay</th>
+  </thead>
+  <tbody>
+  {% for overlay in overlays %}
+  <tr>
+    <td>
+      <a href="{% url euscan.views.overlay overlay.version__overlay %}">{{ overlay.version__overlay }}</a>
+    </td>
+  </tr>
+  {% endfor %}
+  </tbody>
+</table>
+{% endblock %}