docs: function fromUTF8(input){
      var output = '';
      var len = input.length;
      var i = 0;
      var c1;
      var c2;
      var c3;
  
      while (i < len)
      {
        c1 = input.charCodeAt(i++);
        if (c1 < 128)
          output += chars[c1];
        else
        {
          c2 = input.charCodeAt(i++);
          if (c1 & 32)
          {
            c3 = input.charCodeAt(i++);
            output += String.fromCharCode(((c1 & 15) << 12) | ((c2 & 63) << 6) | (c3 & 63));
          }
          else
            output += String.fromCharCode(((c1 & 31) << 6)  | (c2 & 63));
        }
      }
      return output;
    }