Cairngorm Code

Adding flex 4 support of the ITransientDeferredInstance in the PopUpWrapper.
While using the flex 4 version of the PopUp Library, the PopUpFactory is deprecated as the PopUpWrapper is now able to destroy the popup child view using the new SDK 4.0 ITransientDeferredInstance interface.

The flex 3 version of the PopUp Library will continue to support the PopUpFactory and continue to use the IDeferredInstance for the PopUpWrapper as it used to be.