code: function Leipzig(selector) {
      var config = arguments.length <= 1 || arguments[1] === undefined ? {} : arguments[1];
  
      if (!(this instanceof Leipzig)) {
        return new Leipzig(selector, config);
      }
  
      if (typeof selector !== 'undefined') {
        if (typeof selector === 'string' || selector instanceof NodeList || selector instanceof Element) {
          config.selector = selector;
        } else if (typeof selector === 'object') {
          // if the first argument is an object, let's assume it's actually a
          // configuration object, and not the selector
          config = selector;
        } else {
          throw new Error('Invalid selector');
        }
      }
  
      this.config(config);
    }
docs: Creates a Leipzig.js glossing object
  @constructor
  @param {String|NodeList|Element} selector - determines elements to be glossed
  @param {Object} config - configuration object