Merge pull request #748 from SlicerRt/update-SlicerRT

ENH: SlicerRT 0.14.4: Follow Slicer core changes related to subject hier...
Merge pull request #749 from SlicerRt/update-SlicerRT

ENH: SlicerRT 0.14.5: Fixed Linux and Mac build that failed because wron...
COMP: Fix Reporting module to compile against VTK6

Reporting module updated to work with both VTK5 and 6.
Fixed code and tests.
Merge pull request #750 from naucoin/update-Reporting

COMP: Fix Reporting module to compile against VTK6
ENH: SlicerRT 0.14.6: Fixed automatic tests. See more info at https://www.assembla.com/code/slicerrt/subversion/changesets/compare/1912...1929