_includes/head.html

<head>
    <meta charset="utf-8">
    <meta http-equiv="x-ua-compatible" content="ie=edge">
    <title>{% if page.title %}{{ page.title }}{% else %}{{ site.title }}{% endif %}</title>
    <meta name="description" content="{% if page.excerpt %}{{ page.excerpt | strip_html | strip_newlines | truncate: 160 }}{% else %}{{ site.description }}{% endif %}">
    <meta name="viewport" content="width=device-width, initial-scale=1">

    <link rel="apple-touch-icon" href="apple-touch-icon.png">
    <link href="//fonts.googleapis.com/css?family=Cabin:400,400i,600,700" rel="stylesheet">
    <link rel="stylesheet" href="{{ "/css/main.css" | prepend: site.baseurl }}">
    <script src="{{ "/js/vendor/modernizr-2.8.3.min.js" | prepend: site.baseurl }}"></script>
    {% if site.googleanalytics %}
    <script>
      var okiConsent = {
        analyticsTrackingID: '{{ site.googleanalytics }}',
      }
    </script>
    <script src="https://a.okfn.org/html/oki/consent/assets/js/consent.js"></script>
    {% endif %}
</head>