code: function getHeaderCodeAsScriptTags(root) {
      var ret = "";
      headerSources.forEach(function (src) {
          if (root) {
              src = path.join(root, src);
          }
          src = path.resolve(src);
          ret += "<script src=\"" + src + "\"></script>";
      });
      return ret;
  }
docs: returns an HTML string of <script> tags, one of each header file, with the
  absolute path of the header file