ENH: SlicerRT 0.14.4: Follow Slicer core changes related to subject hierarchy to fix build. See more info at https://www.assembla.com/code/slicerrt/subversion/changesets/compare/1860...1901
Merge pull request #748 from SlicerRt/update-SlicerRT

ENH: SlicerRT 0.14.4: Follow Slicer core changes related to subject hier...