An extension, which can be used with Base.build to add zIndex and

shimming support to a Widget class.

3.1.1

* No changes

3.1.0

* No changes

3.0.0

* Recreate iframe shim from TEMPLATE for each instance, instead of

cloning a class level cached Node instance, so that ownerDocument

can be set to match the bounding box.

3.0.0 beta 1

No Changes

3.0.0PR2 - Initial release