- compacter messages in some cases

STYLE: simplify output handling of line numbers

- relax casting rules
  * down-cast of labelToken to boolToken
  * up-cast of wordToken to stringToken.
    Can use isStringType() test for word or string types

- simplify constructors, move construct etc.

- expose reset() method as public, which resets to UNDEFINED and
  clears allocated storage etc.

DEFEATURE: remove assign from word or string pointer.

- This was deprecated 2017-11 and now removed.
  For this type of content transfer, move assignment should be used
  instead of stealing pointers.

- makes its use somewhat clearer and allows more future options

- new patches were added to the end of existing patches, which placed
  them _after_ the processor patches. This is incorrect.

CONFIG: remove adios1 config files

- OPENFOAM_PLUS was last used in OpenFOAM-v1712 and provided as a
  transition from OpenFOAM-v1806 until OpenFOAM-v1906

- OPENFOAM_COM was never used

- creates a std::string with space-delimited tokens, which can be sent
  to another application or even re-parsed into tokens

1) Add softWall rigidBody restrain
2) Add linearSpringDamper sixDoF restrain to work as soft rope
3) dynamicMotionSolverListFvMesh changed to dictionary based input
4) Add Time reference access to sixDof restraints
5) Add drivenLinearMotion to solidBodyMotionFunctions.

- allows some internal handling for reading dissimilar storage types.
  Eg, scalars written as float (WM_SP), but read as double (WM_DP)

- reading binary parcel coordinates with dissimilar storage types is
  still pending

- change contiguous from a series of global functions to separate
  templated traits classes:

    - is_contiguous
    - is_contiguous_label
    - is_contiguous_scalar

  The static constexpr 'value' and a constexpr conversion operator
  allow use in template expressions.  The change also makes it much
  easier to define general traits and to inherit from them.

  The is_contiguous_label and is_contiguous_scalar are special traits
  for handling data of homogeneous components of the respective types.

- returns the memory address formatted in hexadecimal, which can be
  useful for detailed information

- in addition to m() and n(), provide Matrix mRows()/nRows(), nCols()
  methods.  These provide unambiguous access names.

  'mRows()' == for internal consistency with MatrixSpace.
  'nRows()' == a commonly used naming.

- as per boolList, labelList typedefs in List.H

- was added for #1394

- additional support for face sync/swap of boundary values.
  This allows use of bitSet instead of boolList in more places

- grows or shrinks a cellSet based on its external perimeter.
  Not yet working across coupled boundaries.

- with 1906, OpenFOAM is purely C++ code and the last toolchain bits C
  code have been avoided. Thus relax the wmake C rule for including
  WM_COMPILE_OPTION. This makes it much easier to add different
  compiler options with fewer files.

  For example, for Broadwell-specific options:

      cd wmake/rules/linux64Gcc
      cp c++Opt c++OptBdw

      edit this file and then use WM_COMPILE_OPTION=OptBdw

- ensure that WM_COMPILE_OPTION is always non-empty

- this can be use for situations where the cloud data has been
  provided by a non-file transport.

- for the most basic level construction with mesh and position only.

- use cloud::defaultName instead of "defaultCloud" string literal

- a top-level cloud::nParcels() virtual, which is overloaded by the
  first level of Cloud inheritance. This permits quick determination of
  cloud sizes, even when retrieved from registry with the base level.
  Eg,
      cloud* cldPtr = mesh.cfindObject<cloud>("myCloud");
      label nParcels = (cldPtr ? cldPtr->nParcels() : 0);

- make writeLagrangianPositions on by default unless explicitly
  disabled in the InfoSwitches.

  Flag output errors (where neither coordinates nor positions are
  written) with Fatal.

- additional IOField helper functions in cloud

STYLE: simplify iterator inheritance

- these use the additional byte-size checks in IOstream to handle
  native vs non-native sizes