Matrix transform tutorial update
Merge pull request #621 from VictorLamoine/matrixTransform

Matrix transform tutorial update
Fix: alignment issue of SupervoxelClustering
Merge pull request #625 from chia0418/fix-supervoxel-clustering-alignment

Fix: alignment issue of SupervoxelClustering
Issue #564: Fix tutorials warning
Merge pull request #627 from VictorLamoine/issue564

Fix tutorials warnings (fixes #564)