Added simple vtk-based feature extraction and mesh quality operators.
Merge branch 'master' of http://github.com/CognitionGuidedSurgery/msml

Conflicts:
	operators/MiscMeshOperators/CMakeLists.txt
	operators/MiscMeshOperators/miscmesh.i
Merge branch 'master' of http://github.com/CognitionGuidedSurgery/msml