BUG: primitiveMesh: cellPoints, cellEdges inconsistent API. Fixes #703.

See merge request OpenFOAM-plus!189

It creates a swirling velocity across a baffle using jumpCyclic for vectors

- now warn about the following:
  * the bounding box does not overlap wih the global mesh
  * plane does not intersect the (valid) bounding box
  * plane does not intersect the global mesh

- add bounding to the "plane" variant of a sampled plane.

-  boundBox::nDim() to assess dimensionality

- boundBox::intersect(const plane&) to test if plane intersects the
  bounding box

STYEL: use constexpr for VectorSpaceOps

- runTimeModifiable change to the dictionary not being propagated to
  the underlying functionObjects

- forward command-line arguments for paraview, where they may also be
  evaluated (cshrc, POSIX shell)
  Eg,
      . etc/bashrc ParaView_VERSION=5.4.1-mpipy
      source etc/cshrc ParaView_VERSION=5.4.1-mpipy

- this currently just strips off the leading parent directory name

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

     relative("/this/path")  -> "and/subdirs/name"
     relative("/this")       -> "path/and/subdirs/name"

ENH: Adding optional output information ordered by injectorID to LocalInteraction.

See merge request OpenFOAM-plus!187

- adjust return values of HashSet operators.

- problems when the cloud was not available on all processors.

- NB: ensight measured data only allows a single cloud, but
  foamToEnsight writes all clouds.

'delta'

The scheme should now be specified using, e.g.

    div(phi,U)      Gauss DEShybrid
        linear                    // scheme 1
        linearUpwind grad(U)      // scheme 2
        hmax                      // LES delta name, e.g. 'delta', 'hmax'
        0.65                      // DES coefficient, typically = 0.65
        30                        // Reference velocity scale
        2                         // Reference length scale
        0                         // Minimum sigma limit (0-1)
        1                         // Maximum sigma limit (0-1)
        1.0e-03;                  // Limiter of B function, typically 1e-03

This reverts commit 0ee1ed63.

Feature memory streams

See merge request OpenFOAM-plus!191

- simplify structure.
- protect against nullptr when resetting memory streams
- make UIListStream swappable
- add uiliststream as an example of using a plain std::istream

- as per readInt32(), readInt64() etc.
  Previously only had readScalar() in a two-parameter form.

- these were previously taken from region-local directories
  (eg, constant/region/triSurface), but this becomes difficult to
  manage when there are many files and regions.

- The central InfoSwitch "writeLagrangianPositions" allows writing an
  additional Lagrangian "positions" file, but these were not being
  written by reconstructPar. These are now also written in reconstructPar
  if the central writeLagrangianPositions InfoSwitch is enabled.

NOTES

- "positions" are reconstructed from the processors "coordinates" file

- decomposePar will not attempt to create or redistribute any
  "positions" files