message: Move releases.json to gh-pages
diff: dropdown.empty();
  dropdown.append('<option selected="true" value="master">master</option>');
  dropdown.prop('selectedIndex', 0);
  - $.getJSON('./s3/releases.json', function (data) {
  + $.getJSON('https://heremaps.github.io/harp.gl/releases.json', function (data) {
  $.each(data, function (key, entry) {
  dropdown.append($('<option></option>').attr('value', entry.hash).text(entry.date));
  })
  