Refactoring II tools

Some refactoring to use new tools from II instead of the deprecated ones.

- Adding computation of first and second principal curvatures in 3dCurvatureViewer and 3dCurvatureViewerNoise.
- Use new II estimators in 2dLocalEstimators, 3dLocalEstimators and 3dCurvatureViewerNoise.

:octocat: 

Agree, it's -K (because -k is already used) or --kernelradius