add missing font awesome to base template

templates/base.html

@@ -13,6 +13,7 @@
     <link href="{{ static_prefix }}media/css/style.css" rel="stylesheet">
     <link rel="stylesheet" type="text/css" href="{{ static_prefix }}media/css/pygments_style.css" media="screen" />
     <link rel="stylesheet" type="text/css" href="{{ static_prefix }}media/css/site.css" media="screen" />
+    <link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/font-awesome/4.5.0/css/font-awesome.min.css">
     {% endblock css %}
   </head>
   {% endblock head %}