- generalize identity matrix constructors for non-scalar types

- add constructors using labelPair for the row/column sizing information.
  For a SquareMatrix, this provides an unambiguous parameter resolution.

- reuse assignment operators

STYLE: adjust matrix comments

- add vsmall pTraits for scalars
- report the solve scalar in buildArch information

- for most functions the input type and return type are identical,
  but MinMax, sumMag are not.

- previously returned scalar, but now return pTraits cmptType
  which is the same as scalarProduct / outerProduct type.

- eg pTraits<complex>::zero, pTraits<complex>::one instead.
  This is consistent with other primitives such as scalar, label etc.

- make names consistent with lduMatrix
    A*x  => Matrix::Amul
    AT*x => Matrix::Tmul  (same as x*A)

- reduces installation clutter, allows easier cross-referencing

- remove older deprecated scripts (foamDebugSwitches, foamGraph*)

- when windows portable executables (.exe or .dll) files are loaded,
  their dependent libraries not fully loaded. For OpenFOAM this means
  that the static constructors which are responsible for populating
  run-time selection tables are not triggered, and most of the run-time
  selectable models will simply not be available.

Possible Solution
=================

  Avoid this problem by defining an additional library symbol such as
  the following:

      extern "C" void libName_Load() {}

  in the respective library, and tag this symbol as 'unresolved' for
  the linker so that it will attempt to resolve it at run-time by
  loading the known libraries until it finds it. The link line would
  resemble the following:

      -L/some/path -llibName -ulibName_Load

  Pros:
    - Allows precise control of forced library loading

  Cons:
    - Moderately verbose adjustment of some source files (even with macro
      wrapping for the declaration).
    - Adjustment of numerous Make/options files and somewhat ad hoc
      in nature.
    - Requires additional care when implementing future libraries and/or
      applications.

  - This is the solution taken by the symscape patches (Richard Smith)

Possible Solution
=================

  Avoid this problem by simply force loading all linked libraries.
  This is done by "scraping" the information out of the respective
  Make/options file (after pre-processing) and using that to define
  the library list that will be passed to Foam::dlOpen() at run-time.

  Pros:
    - One-time (very) minimal adjustment of the sources and wmake toolchain
    - Automatically applies to future applications

  Cons:
    - Possibly larger memory footprint of application (since all dependent
      libraries are loaded).
    - Possible impact on startup time (while loading libraries)
    - More sensitive to build failures. Since the options files are
      read and modified based on the existence of the dependent
      libraries as a preprocessor step, if the libraries are initially
      unavailable for the first attempt at building the application,
      the dependencies will be inaccurate for later (successful) builds.

  - This is solution taken by the bluecape patches (Bruno Santos)

Adopted Solution
================

  The approach taken by Bruno was adopted in a modified form since
  this appears to be the most easily maintained.

Additional Notes
================

  It is always possible to solve this problem by defining a corresponding
  'libs (...)' entry in the case system/controlDict, which forces a dlOpen
  of the listed libraries. This is obviously less than ideal for large-scale
  changes, but can work to resolve an individual problem.

  The peldd utility (https://github.com/gsauthof/pe-util), which is
  also packaged as part of MXE could provide yet another alternative.
  Like ldd it can be used to determine the library dependencies of
  binaries or libraries. This information could be used to define an
  additional load layer for Windows.

- reduces some dictionary clutter and probably looks less confusing
  than having an ending that may not correspond to the current OS.

  Eg, "fvOptions" instead of "libfvOptions.so", "libfvOptions.dylib" ...

- convenience dlOpen method for multiple files

STYLE: remove unused local variables in edgeMeshFormat

- the vector-matrix multiplication is treated as a row vector

- add iterators, begin/end, empty() methods for STL behaviour.
  Use standard algorithms where possible
     * std::fill, std::copy
     * std::min_element, std::max_element

- access methods consistent with other OpenFOAM containers:
     * data(), cdata(), uniform()

- Use ListPolicy to impose output line breaks

- Can recover matrix storage for re-use elsewhere.
  For example, to populate values with 2D i-j addressing and later
  release it as flat linear storage.

- construct/assign moveable

- added minMax() function for Matrix

- additional inplace +=, -=, *=, /= operations

- add named methods at() and rowData() to Matrix.
  Allows a better distinction between linear and row-based addressing

- low-level matrix solve on List/UList instead of Field

- use std::hypot for complex mag() instead of long-hand version

- Detail::conj() function for complex or non-complex

Feature dictionary checking

See merge request OpenFOAM-plus!259

- can be used to check the validity of input values.

Example:

    dict.getCheck<label>("nIters", greaterOp1<label>(0));
    dict.getCheck<scalar>("relax", scalarMinMax::zero_one());

- use 'get' prefix for more regular dictionary methods.
  Eg, getOrDefault() as alternative to lookupOrDefault()

- additional ops for convenient construction of predicates

ENH: make dictionary writeOptionalEntries integer

- allow triggering of Fatal if default values are used

ENH: additional scalarRange static methods: ge0, gt0, zero_one

- use GREAT instead of VGREAT for internal placeholders

- additional MinMax static methods: gt, le

BUG: The ok_ flag was not being updated in the regExpCxx::set() method

This is to avoid overset interpolation in the calculation of the stencil
itself since this triggers a loop.

- records execution and wallclock times to postProcessing/
  which can be more convenient than parsing a log file.