HD95 and MSD in voxels and not in mm

[VendenIX]

The Hausdorff 95 and Mean Surface Distance needs to be updated ! The code use the transformation in voxels used for the Dice and Jaccard for the compute of HD95 and MSD distances ..

Identified issue :

• The metrics currently calculate Euclidian distance based on array indices (voxels) without accounting for voxel spacing and anisotropy. The results should be in millimeters instead to be physically accurate.
• Topology error : The distances are calculated between the full binary masks (filled volumes) instead of the surface boundaries.

To fix :

• need to update the metric function to handle this (accept raw dicom in mm as arguments, and update the functions of HD and MSD.