code: function Joystick(displayOTron) {
      if (!(this instanceof Joystick)) {
          return new Joystick(displayOTron);
      }
      
      var self = this;
      
      displayOTron.on('event', function(event) {
          if (event.component === 'Joystick') {
              self.emit(event.event);
          }
      });
      
      events.EventEmitter.call(this);
  }
docs: Creates a new `Joystick` object.
  Note: you should not instantiate this class directly. Instead, use the `joystick` property of an initialized `DOT3k` object.
  @constructor
  @param {DisplayOTron} displayOTron The `DisplayOTron` instance.