An extension, which can be used with Base.build to add basic XY page 
based positioning support to a Widget class

3.1.1

* No changes

3.1.0

* Relatively positioned bounding boxes, will default to 
  page position instead of 0,0

3.0.0

* Fixed ability to set individual x, y values.

3.0.0 beta 1

No Changes

3.0.0PR2 - Initial release

