Create InSicht instance
@param  {Object} [options] - options for InSicht
@return {Object}           - InSicht instance
function InSicht() {
      var options = arguments.length > 0 && arguments[0] !== undefined ? arguments[0] : {};

      _classCallCheck(this, InSicht);

      this.options = Object.assign({}, defaults, options);
      this.init();
    }