- now supports a parcel selection mechanism like vtkCloud,
  giving the ability to select a subset of parcels.
  For example, a given stride, or removal of parcels with a small
  diameter.

  Eg,
      dataCloud output Time: 3.2
      Applying parcel filtering to 994 parcels
      - add stride 4
      - subtract field U : (less 0.2)
      After filtering using 214/994 parcels

- add output precision control for dataCloud

- vtkWrite with moving mesh was not updated the subsets properly,
  which caused it to crash.

- foamToVTK -overwrite ignored for single region cases,
  was working for multi-region cases

- minor documentation changes

- can filter by stride or field information.
  For example,

      selection
      {
          stride
          {
              // every 10th parcelId
              action  add;
              source  stride;
              stride  10;
          }
          Umin
          {
              // Remove slow parcels
              action  subtract;
              source  field;
              field   U;
              accept  (less 1e-3);
          }
          diam
          {
              // Only particular diameter ranges
              action  subset;
              source  field;
              field   d;
              accept  (greater 1e-3) and (less 1e-3);
          }
      }

- align with foamToVTK code base

- Default format is now XML binary (base64) instead of legacy format.
  The old -xml option is redundant and ignored.
  The new -legacy option can be used to force legacy output instead.

- Polyhedral decomposition is now off by default (old -poly is ignored).
  The option -poly-decomp forces decomposition of polyhedrals into
  primitive shapes.

- reduced memory footprint by reading and converting fields
  successively.

- Creation of symlinks to processor files is no longer required or
  desired. The old -noLinks option is ignored.

- Ignore -useTimeName option. Always number according to timeIndex.

- align input parameters and some of the behaviour with vtkWrite

  The output is now postProcessing/<name> for similar reasoning as
  mentioned in #866 - better alignment with other function objects, no
  data collision with foamToEnsight output.

- separate controls for internal and boundary meshes

- can restrict conversion based on zone names, enclosing volumes,
  bounding box.

- communication mode is now selectable (default is blocking)

- eliminate serial-only version as being redundant

- this removes the old 'magically' means of suppressing the internal
  mesh in favour of specifying it directly.

- parallel output.

  The output is now postProcessing/<name> for similar reasoning as
  mentioned in #866 - better alignment with other function objects, no
  collision with foamToVTK output.

- align the input parameters with those of vtkCloud so that we can
  specify the ASCII precision and the padding width for the output
  file names as well.

- emit TimeValue field, support file series generation

- support internal or boundary meshes, combining the result into a vtm
  file.

- can restrict conversion based on zone names, enclosing volumes,
  bounding box

- now handled by the vtk::seriesWriter, and with its static methods.

- use parallel list writing, beginDataArray methods.

- use static_assert to restrict conversion of non-label integral types

- cache .vtp.series information by fileName instead of by cloud name.
  This issues if the output directory changes, and simplifies code.

ENH: emit TimeValue in files generated by vtkCloud

- additional information for passing to ParaView

ENH: vtkCloud output to postProcessing/ (issue #866)

- better alignment with other function objects, no collision with
  foamToVTK output.

-  implemented as vtk::surfaceFieldWriter, which replaces
   the vtk::writeSurfFields function.

- removed vtk::writeField templates. No longer used.

- introduce lower-level vtk::indirectPatchWriter class

- Provides a means of accumulating file entries for generating vtm
  by accumulate blocks, datasets and writing them later.

  Only a single block depth is currently supported and the methods
  are kept fairly simple.

- Output formats such as vtp, vtu follow a particular internal data
  structure (HEAD, FIELD_DATA, PIECE, CELL_DATA/POINT_DATA) and other
  output conventions. This writer base tracks these expected output
  states internally to help avoid logic errors in the callers.

- parallel list output for foamVtkOutput

- simplified '.series' file output

- beginDataArray() method instead of openDataArray() + closeTag()
  since this seems to be the most common use anyhow.
  With an optional argument for leaving the tag open, this works the
  same as openDataArray() which may be deprecated in the future.

- begin/end methods for CellData, PointData, FieldData (commonly used)

- templating parameters for file headers, content version,
  legacy fields. This improves coding robustness and convenience of use.

- use formatter and higher-level methods for legacy output

- attribute quoting character now part of the formatter itself
  instead of as an argument for xmlAttr().
  Toggle with quoting() method.

- pair-wise processing of xml attributes, which also allows them to be
  passed as optional entries when creating an xml tag.

- xmlComment with multiple arguments

- allows cell point labels will use global numbering, but only for
  unmerged points. We'd ideally like to avoid point merging per se,
  and instead use VTK point blanking instead (as required).

  This approach allows parallel collation of the output into a single
  piece directly.

- this would automatically change openfoam<digits> into maj.min.rel
  values, thus transforming openfoam1806 into a version "1.8.0.6" !

- provide edit for adjusting the ThirdParty and fallback site variables.
  This is useful when packaging into a single directory, and possibly
  without any ThirdParty dependencies.

- support '-prefix' (similar to auotconfig) as an alternative to
  '-foamInstall'. Use this prefix to set the prefix directly.
  Bypasses and disables the bash sourcing magic.

- Within strings it is preferable to use the "<etc>" instead.
  Most use cases for the old "~OpenFOAM" expansion have been obsoleted
  by the #includeEtc directive.

- use std::string instead of c-string for the string constants

- centralize some definitions of resources into foamVersion.H

  Now expose some of the hard-coded values used in foamEtcFiles()
  so that they can be known or even overridden as required.

  Relocate to src/OpenFOAM/include as a constant location.

- uses wmake, without OpenFOAM libraries.

  The application and libray serve as a minimal test case for wmake,
  but can also be used to generate a minimal library/executable pair
  target for testing of packaging etc.

- file is to be sourced, non-executable.

- remove stray .keep file from tutorial case

- Prefer the $WM_PROJECT_VERSION from the environment, since this
  is consistent with the foamEtcFile script, and matches better to
  user expectations.

- For compatibility, access to the old global names is provided via
  macros
        #define FOAMversion     foamVersion::version
        #define FOAMbuild       foamVersion::build
        #define FOAMbuildArch   foamVersion::buildArch

- this isolation makes it easier to provide additional scoped methods
  for dealing with version related information.  Eg, printBuildInfo()

- foamVersion.H now includes stdFoam.H for consistent use
  of compatibility compiler defines.

- move forward declaration of Detail, Module namespaces to stdFoam.H

- doxygen documentation of Foam namespace in stdFoam.H