COMP: use STL's unordered map instead of KWSYS's hash map
COMP: use STL's unordered map instead of KWSYS's hash map

dzenanz/MorphologicalContourInterpolation,KitwareMedical/MorphologicalContourInterpolation,KitwareMedical/ITKMorphologicalContourInterpolation,dzenanz/MorphologicalContourInterpolation,KitwareMedical/ITKMorphologicalContourInterpolation,KitwareMedical/MorphologicalContourInterpolation