PATCH: Maximum depth of group

Change-Id: I12e2658a738788a14105f5ab8a2156ce1b57d3f0
Merge topic 'object-depth-spatialobject-patch'

402017b PATCH: Maximum depth of group
Merge branch 'master' of git://tubetk.org/TubeTK into ITKMetaDocuments

Change-Id: I5c701be94950d4a9b5a0dd0945a0df10f27cf8f7