700italic,400,700" rel="stylesheet"
          type="text/css">
    <link rel="stylesheet" href="//maxcdn.bootstrapcdn.com/bootstrap/3.3.0/css/bootstrap.min.css">
    <link href="//maxcdn.bootstrapcdn.com/font-awesome/4.2.0/css/font-awesome.min.css" rel="stylesheet">
    <link rel="stylesheet" href="//cdnjs.cloudflare.com/ajax/libs/highlight.js/9.7.0/styles/default.min.css">
    {% style "css/screen.css" %}
</head>
<body>


<nav class="navbar navbar-default">
    <div class="container">
        <div class="n