more work on node data

Geo/GModel.cpp

Geo/GModel.h

Geo/GModelIO_Mesh.cpp

Geo/OCCEdge.h

Graphics/Post.cpp

Mesh/BDS.h

Mesh/meshGRegionLocalMeshMod.h

Numeric/GaussLegendre1D.h

Post/PView.cpp

Post/PView.h

Post/PViewData.h

Post/PViewDataGModel.cpp

Post/PViewDataGModel.h

Post/PViewDataGModelIO.cpp

Post/PViewDataList.cpp

Post/PViewDataList.h

Post/PViewDataListIO.cpp