Added FA.render() method.
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title>FA tags example</title>
<link rel="stylesheet" href="https://use.fontawesome.com/releases/v5.15.1/css/all.css" crossorigin="anonymous">
<link rel="stylesheet" href="https://unpkg.com/purecss@2.0.3/build/pure-min.css" crossorigin="anonymous">
<meta name="viewport" content="width=device-width, initial-scale=1">
</head>
<body>
<div id="main">Please run mill example.fastOpt to build the demo. Then reload this page.</div>
<script type="text/javascript" src="out/example/fastOpt/dest/out.js"></script>
<script>
Example5.main();
</script>
</body>
</html>