Add LabelShapeStatisticsImageFilter

This filter is a wrapper to the
LabelImageToShapeLabelMapFilter. There is not image output. Instead of
the LabelMap provided by the original filter, this SimpleITK filter
provides access to the resulting statistics as members through the
active measurements system.

Change-Id: I843dc9dd66db1867e71e82838b22a11609294422
Merge topic 'SIMPLEITK-516_AddToLabelMapAndToStatisticsLabelMapFilteters' into next

329fd006 Add LabelShapeStatisticsImageFilter