CPL-0.2.0: web/favicon_header.html

<link rel="icon" type="image/x-icon" href="favicon.ico">
<link rel="icon" type="image/png" sizes="32x32" href="favicon-32x32.png">
<link rel="icon" type="image/png" sizes="16x16" href="favicon-16x16.png">
<link rel="apple-touch-icon" sizes="180x180" href="apple-touch-icon.png">
<link rel="manifest" href="manifest.json">
<meta name="theme-color" content="#4ec9b0">