anchor.diff:  
     /**
      * Create a Button from [StageXL.BitmapData ].
  -   * 
  +   *
      * * stateContext: current state you are in
      * * text: label of the button
      * * addToWorld: add the button to the world?
  
positive.code: 
    /**
     * Create Button from an image inside a texture atlas.
     * 
     * * textureAtlasName: name of the texture atlas in the resourceManager
     * * resourceName: name of the resource in the texture atlas(image name without extension)
     */
  
negative.code:   set y(int y) {
      super.y = y;
      buttonText.y = y;
    }
  
    /**
     * Put the pivot point into the center of the button.
     */
    void centerPivot() {
      pivotX = bitmapData.width / 2;
      pivotY = bitmapData.height / 2;
    }
  
    /**
  