ENH: Release of SlicerRT 0.9.0: New Contour Comparison and Patient Hiera...

...rchy modules. One-up quantitative layout in DVH module. Fixed Contour node labelmap resampling (coordinate systems/voxel cenerpoint issue). Many other bugfixes. See more info at https://www.assembla.com/code/slicerrt/subversion/changesets/compare/624..733