message: Stick to three.js 0.105 for the harp.gl landing page
diff: <link rel="stylesheet" type="text/css" href="css/index.css">
  <link rel="shortcut icon" href="resources/favicon.ico">
  <script src="js/credentials.js"></script>
  - <script src="https://unpkg.com/three/build/three.min.js"></script>
  + <script src="https://unpkg.com/three@0.105.2/build/three.min.js"></script>
  <script src="https://unpkg.com/@here/harp.gl/dist/harp.js"></script>
  <meta name="twitter:card" content="summary" />
  