Clarified save-parameter usage in vtkAOSDataArrayTemplate::setArray().

This introduces a possible problem as the Vtk array wrapper around
properties is not const and therefore the properties can be modified
by using this wrapper.

Regular VTK data arrays are derived from vtkAOSDataArrayTemplate.
It is sufficient for non-copy memory access to pass a pointer from
our PropertyVector to the vtk data array.

This is needed for the GMSH interface.

[MatL] Correct s_odot_s() product for 2D cases.

[HPC] Partition PropertyVectors and read partitioned PropertyVectors