Process facestream in vtkExtractUnstructuredGridPiece::RequestData.

Change-Id: Ib8b168a0c443fe945d78bb16bf1159cff14abdd7
Handle polyhedra in vtkUnstructuredGridWriter.

Change-Id: I6c20eb8650e2b079c8b1f581c9727a3d8205087a
Added ability to control alpha shape output

Change-Id: I7fb57f3a45922d9106e7395329d62e5f060b1417
Fix bag plot and functional bag plots tests.

Use precomputed table of densities to avoid precision differences
on some machines.
Also remove unuseful normalization step in the plot and algorithm.

Change-Id: Ifb28b82b276ee93b66f4ddf8f4375f7b3b465b94
Merge topic 'FixBagPlotsTests' into master

5d42650d Fix bag plot and functional bag plots tests.
Merge topic 'Delaunay3D-Alpha-0014050' into master

eb41a259 Added ability to control alpha shape output
Merge topic '14258-remote-polyhedra' into master

c8bec1f2 Handle polyhedra in vtkUnstructuredGridWriter.
42b0733e Process facestream in vtkExtractUnstructuredGridPiece::RequestData.