anchor.diff:  var Familiarity = function () {
       this.familiarityRenderedFlag = false;
       this.familiaritiesUrl = '<%= Familiarity::Engine.routes.url_helpers.familiarities_path(format: :json) %>';
  +    this.familiarity_hash_pointer = -1;
  +    this.familiarity_hash = {};
  +    this.familiarity_bubbles = [];
   
       // Show and hide on F1 and ESC key respectively
       var _this = this;
  
positive.code:         if (e.keyCode == 112 && !_this.familiarityRenderedFlag) { //F1 key pressed
              _this.familiarityView(true);
          }
      });
  }
  Familiarity.prototype = {
      fetchFamiliarities: function (callback) {
          if (typeof(callback) != 'function') {
              callback = function (familiarity_hash) {
  
negative.code:                 console.log(familiarity_hash);
              }
          }
          var _this = this;
          $.get(this.familiaritiesUrl, function (data) {
              var familiarity_hash = data[$(location).attr('pathname')]
              if (familiarity_hash == null) {
                  familiarity_hash = {}
              }
              _this.familiarity_hash = familiarity_hash;
              callback(familiarity_hash);
          });
      },
      familiarityView: function (enable) {
          var _this = this;
          if (typeof(enable) == 'undefined') {
              enable = true;
          }
          if (enable == true) {
              //Rendering overlay
              $('body').addClass('familiarity-view').append($('<div id="familiarity_dim"></div>'));
  
              //Making bubble pop-out //////////////////
              this.fetchFamiliarities(function (familiarity_hash) {
                          _this.showNextBubble();
                      }
              );
  
              //Marking flag that familiarity_view is rendered
              this.familiarityRenderedFlag = true;
          } else {
              //Removing bubbles
              _this.hideFBubbles();
  
              //Removing rendered overlay
              $('#familiarity_dim').remove();
              $('body').removeClass('familiarity-view');
  
  