New smoothState signature

initSmoothState.js

// Contents of functions.js
;(function($) {
  'use strict';
  var $body = $('html, body'),
      content = $('#main').smoothState({
        // Runs when a link has been activated
        onStart: function(url, $container) {
          // toggleAnimationClass() is a public method
          // for restarting css animations with a class
          content.toggleAnimationClass('is-exiting');
          // Scroll user to the top
          $body.animate({
            'scrollTop': 0
          });
        }
      }).data('smoothState');
      //.data('smoothState') makes public methods available
})(jQuery);