Fixed issue when retrieving pixel values in 2D
Save/Reload pixel size in Mesh3D.{saveTo|LoadFrom}XML()
Deformation profiler:
* replaced "RadiiVar" and "Roughness" by "Smoothness" (ranges from 0 to 100%)
* JavaDoc with more details (and illustration) on some descriptors
* added Sphericity (synonym to roundness),
* elongation factor, flatness (both based on an ellipsoid fitting)
* code cleaning