This commit includes the following bugfix :
 * Global clean up of the vtkPlaneCutter
 * InterpolateAttributes and GenerateNormals have been added
 * Output is now simply a multipiece
 * Support for all kind of dataset
 * Updated Tests
 * MarchingCube matrix have been corrected
 * vtkSphereTree typo fix
 * FieldData fix
 * uses of bools instead of int