- major() and minor() are GNU macros in sys/sysmacros.h
  and generates warning on some systems (eg, Ubuntu 18.04)

  use getMajor() and getMinor() as method names instead.

- corrected the mass based correction and updated the misleading function
  arguments

- moved the option to the optimisation switches, e.g.:

    OptimisationSwitches
    {
        experimentalDdtCorr 1;
    }

- default remains off/no (0)

- in places where we use std::cerr instead or Warning or FatalError.
  We only want messages from one process though.

ENH: vtkCloud function object (issue #866)

See merge request OpenFOAM-plus!206

ENH: add foamRestoreFields utility (issue #877)

See merge request OpenFOAM-plus!207

- writes lagrangian data in VTP format during a simulation.
  In parallel, all data are written from the master.

- support VTP input in functionObjectCloud scene element

- additional fallback lookup of cloud information from state properties
  instead of cloud OutputProperties

- "Restore" field names by removing the ending.
  Useful, for example, to change a UMean to U field for further
  calculation.

- for Darwin, mention that clang is the only compiler configured

- adjust comments

version on a switch.  See #867

By default the code will use the same form as previous versions

To use the experimental version integrated from openfoam.org commit
da787200 set the info switch in the controlDict:

    InfoSwitches
    {
        experimentalDdtCorr 1;
    }

- when the iso-surface (eg, a cut plane, or distanceSurface) passes
  exactly through the cell centre, zero-sized triangles can occur.
  These should be merged away.

- change "\%" -> "%" in plain string

- minor change to pruning of lagrangian fields