- this corresponds to 'never match', which may be useful in combination
  with -constant selection.

  Eg,

      surfaceMeshTriangulate -constant -time none

  selects only the constant entry and suppresses any automatic time loop

STYLE: adjust help for the standard -times option

- indicate that times can be comma or space separated, since this is
  otherwise not apparent. Don't mention semicolon separators in the help
  since that just adds even more clutter.

- support .vtp format for geometry, surface, line, cloud.

- use native reader for handling vtk, vtp, obj, stl surface files.
  For other formats, use the MeshedSurface (the surfMesh lib) to
  handle reading and Foam::vtk::Tools::Patch to handle the
  conversion to vtkPolyData. This combination is more memory efficient.

- update tutorial case to include vtp surface geometry

- note that it does not actually triangulate unless necessary, should
  probably receive a new name.

- use newer constructs for handling processor/non-processor patch
  selection etc.

- the patch could use face or triFace (labelledTriFace)

- avoid trigger patch faceNormals unnecessarily

- for quantities such as face area/normals etc, it can be useful to
  calculate directly and avoid the overhead of caching all the values.

STYLE: comments, use HashTable lookup() method in whichPoint()

- this allows more use of the runTimePostProcessing functionObject
  that will fail more gracefully if the proper version could not be
  built.

  The dummy functionObject simply emits a message that it is not available.

- primarily for handling cmake replacement libraries

- this is identical to either of these solutions:

     * getEnv("FOAM_CASE")
     * stringOps::expand("<case>")

  but with a closer resemblance to argList or Time globalPath(),
  which makes the intent clearer.
  Avoids using raw strings in the caller, which improves compile-time checks.

  Used in situations where a class has no derivation path or other
  access to a time registry or command args.

- provide relativePath() for argList and for Time.
  These are relative to the case globalPath().
  Eg,

     Info<< "output: " << runTime.relativePath(outputFile) << nl;

- partial solution for issue #1091

  This generates file properties that are case-relative,
  Eg,

      plane0
      {
          p
          {
              file "<case>/postProcessing/plane0/1/p_plane0.vtk";
          }
          U
          {
              file "<case>/postProcessing/plane0/1/U_plane0.vtk";
          }
      }

   This allows the case to be moved elsewhere and still find its files.

   This functionality was previously added for vtkCloud, but now also
   applies to streamLine, sampledSets and sampledSurfaces

- optionally replace stripped parent directory with the \<case\> shortcut

    "/this/path/and/subdirs/name"

    relative("/this/path")        -> "and/subdirs/name"
    relative("/this/path", true)  -> "\<case\>/and/subdirs/name"

- accept origin or centre, as per other geometric entities

- it is sufficient to provide the total number of times that findBinary()
  failed instead of flooding the screen with messages

  Full verbose warnings still emitted when debugging is on.