Adding reflecting fluxes to Solar load radiation model.
Adding functionality to the boundary radiation models and new
place holder for basic wall types such as transparent, opaqueDiffusive,
opaqueReflective,etc.
Changing radiation wall models to run time selectable.
Adding multi-band capabilities to VF model and improving the set up
for using solar loads in VF and fvDOM radiation models.

Reducing running time in controlDict

- check if the first argument corresponds to an OpenFOAM value for
  'true' (as per Switch).
  True == 't', 'y', 'true', 'yes', 'on'. Everything else is not true.

- when the first argument is '-dict', it initializes the value
  with a query via foamDictionary.
  Eg,
       isTrue -dict mydict -entry parallel

   ==> value=$(foamDictionary mydict -entry parallel -value)
       isTrue $value

   a missing entry is silently treated as false.

ENH: add getNumberOfPatchFaces function in RunFunctions

- simple extraction of nFaces from boundary file for given patch/region

- missing 'g' file, improve file consistency (fields, dictionaries)

- parallel output.

  The output is now postProcessing/<name> for similar reasoning as
  mentioned in #866 - better alignment with other function objects, no
  collision with foamToVTK output.

- align the input parameters with those of vtkCloud so that we can
  specify the ASCII precision and the padding width for the output
  file names as well.

- emit TimeValue field, support file series generation

- support internal or boundary meshes, combining the result into a vtm
  file.

- can restrict conversion based on zone names, enclosing volumes,
  bounding box

- helps reduce clutter in the topoSetDict files.

  Caveats when using this.

  The older specification styles using "name" will conflict with the
  set name. Eg,

    {
        name    f0
        type    faceSet;
        action  add;
        source  patchToFace;
        sourceInfo
        {
            name   inlet;
        }
    }

    would flattened to the following
    {
        name    f0
        type    faceSet;
        action  add;
        source  patchToFace;
        name   inlet;
    }
    which overwrites the "name" used for the faceSet.

    The solution is to use the updated syntax:

    {
        name    f0
        type    faceSet;
        action  add;
        source  patchToFace;
        patch   inlet;
    }

- old 'DELETE' enum was easily confused with 'REMOVE', which removes
  the set, not the elements from the set.

- provide corresponding subtractSet() method

STYLE: HashSet set/unset instead of insert/erase methods in topoSetSource

- simplifies switching to/from bitSet storage

- also cleanup by using 0.orig/ directory.
- use foamListRegions to obtain region names

Support the following expansions when they occur at the start of a
string:

    Short-form       Equivalent
    =========       ===========
      <etc>/          ~OpenFOAM/   (as per foamEtcFile)
      <case>/         $FOAM_CASE/
      <constant>/     $FOAM_CASE/constant/
      <system>/       $FOAM_CASE/system/

These can be used in fileName expansions to improve clarity and reduce
some typing

     "<constant>/reactions"   vs  "$FOAM_CASE/constant/reactions"

- list all regions from constant/regionProperties:
     * foamListRegions

- list specific region type from constant/regionProperties:
     * foamListRegions fluid
     * foamListRegions solid

- canonical parameter name changed from "minMedianAxisAngle" to
  "minMedialAxisAngle" (DEC-2013), but was never previously reported
  as having changed.

- improve doxygen entries for searchable surfaces.

- support selection of searchable surfaces with shorter names.
  Eg,
      type   box | cylinder | ...;
  vs  type   searchableBox | searchableCylinder | ...;

  Within decomposeParDict, it is now possible to specify a different
  decomposition method, methods coefficients or number of subdomains
  for each region individually.

  The top-level numberOfSubdomains remains mandatory, since this
  specifies the number of domains for the entire simulation.
  The individual regions may use the same number or fewer domains.

  Any optional method coefficients can be specified in a general
  "coeffs" entry or a method-specific one, eg "metisCoeffs".

  For multiLevel, only the method-specific "multiLevelCoeffs" dictionary
  is used, and is also mandatory.

----

ENH: shortcut specification for multiLevel.

  In addition to the longer dictionary form, it is also possible to
  use a shorter notation for multiLevel decomposition when the same
  decomposition method applies to each level.

- consistent versions in headers

Will Bainbridge authored 7 years ago and Andrew Heather committed 7 years ago

chtMultiRegionFoam now supports reaction/combustion modelling in fluid
regions in the same way as reactingFoam.

TUT: chtMultiRegionFoam: Added reverseBurner tutorial

This tutorial demonstrates chtMultiRegionFoam's combustion capability