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- need to explicitly include vtkPVConfig.h to get the version macros

- use cellCentres() instead of volField equivalent for vtk conversion

- make looping variables more consistent

- use updated Foam::vtk::Tools

- use fieldTypes static information

- eg for foamVersion.H

Final content for 1806 release

See merge request !4

Improvements to cmake configuration

See merge request !3

- the build is now much more strongly oriented on cmake.

  The wmake wrapper only adds some minor versioning on the build
  and uses a standard CMAKE_INSTALL_PREFIX to define its installation
  location.

  These changes can make it easier for some packagers (eg, spack)
  to manage.

 - LIBRARY_OUTPUT_PATH is removed
 - CMAKE_LIBRARY_OUTPUT_DIRECTORY is used instead of LIBRARY_OUTPUT_PATH
 - CMAKE_INSTALL_PREFIX is used as install destination

STYLE: minor formatting for cmake files

DOC: fixed emails in README

See merge request !2

- split off boilerplate OpenFOAM settings as CMakeLists-OpenFOAM.txt

DOC: lowercase names for email addresses (request !2)

- allows restriction of the output patches to specific names and hiding
  others.

- forces release of memory for the associated backends

- log which channels are being emitted.
  The printChannels pipeline was redundant anyhow.

- removed fvMesh sub-channels if favour of selector flags.
  To enable/disable portions of the geometry:

      internal    true/false
      boundary    true/false

  This replaces the previous method of sub-channels in which restrictions
  were propagated from the pipeline through.

  Before
  ======
      Function Object:

          input
          {
              fields    (U p);
          }

      Pipeline:
          input = coprocessor.CreateProducer(datadescription, 'input/patches')

  Now
  ===
      Function Object:

          input
          {
              internal  false;
              fields    (U p);
          }

      Pipeline:
          input = coprocessor.CreateProducer(datadescription, 'input')

- allows cmake override of the default output library directory,
  which is normally $FOAM_LIBBIN

ENH: additional debug verbosity

- extra information (in parallel) when debug level > 1, which can help
  when isolating problems.

- if sigFpe is enabled within OpenFOAM, any errors in the Catalyst
  pipeline will potentially kill the entire simulation.

- use the new sigFpe::ignore helper class to manage a local disabling
  of SIGFPE handling.

- relocate to controlDict, since more than a single function object
  is often used.

- can remove directly from the temporary objectRegistry prior to
  converting by field type. Cannot, however, do the same for volFields
  or areaFields since these reside on their respective mesh objects.

- LINK_LIBRARIES are required for proper try_compile

STYLE: report output directory

- ParaView Catalyst with MPI is advisable (especially for larger
  simulations), but not a requirement

BUG: general patch movement was inconsistent