_includes/builtwithwicket--header.html (3 lines of code) (raw):
<link rel="stylesheet" type="text/css" href="/css/slick-1.5.5.css"/>
<link rel="stylesheet" type="text/css" href="/css/slick-theme-1.5.5.css"/>
<script type="text/javascript" src="/javascript/slick-1.5.5.min.js"></script>