code: function Console(game, messageHistoryCount, elClassName) {
          this.el = document.createElement('div');
          this.el.className = elClassName || 'console';
          this.messageHistoryCount = messageHistoryCount || this.messageHistoryCount;
          this.game = game;
      }
docs: Manages the display and history of console messages to the user.
  "The troll hits you dealing 10 damage."
  "You die."
  @class Console
  @constructor
  @param {Game} game - Game instance this obj is attached to.
  @param {Number} [messageHistoryCount=5] - Number of messages to display at once.
  @param {String} [elClassName='console'] - Css class name to assign to the console element.