ENH: Updated SlicerRT: 0.10.4. Fix Plastimatch build error against ITK to restore nightlies. See more info at https://www.assembla.com/code/slicerrt/subversion/changesets/compare/898..1021
Merge branch 'update-SlicerRT' of https://github.com/SlicerRt/ExtensionsIndex into update-SlicerRT