Added favicon.

boards/templates/boards/base.html

@@ -11,6 +11,9 b''
     <link rel="alternate" type="application/rss+xml" href="rss/" title="
     {% trans 'Feed' %}"/>
 
+    <link rel="icon" type="image/png"
+          href="{{ STATIC_URL }}favicon.png">
+
     <meta name="viewport" content="width=device-width, initial-scale=1"/>
     <meta charset="utf-8"/>
     {% block head %}{% endblock %}