reduce()
- parallel reduction of min/max values.
  Reduces coding for the callers.

  Eg,
      bb.reduce();

  instead of the previous method:
      reduce(bb.min(), minOp<point>());
      reduce(bb.max(), maxOp<point>());

STYLE:

- use initializer list for creating static content
- use point::min/point::max when defining standard boxes

- regression introduced by a7195288

STYLE: add meaningful solid names for some stl files

- to the referenced object via a method name, which may be clearer
  than deferencing the iterator

     [key, value] =>  iter.key(), *iter
     [key, value] =>  iter.key(), iter()
     [key, value] =>  iter.key(), iter.object()

- print and copy operations should not be allowed to dereference a
  nullptr.

- initial step in reducing duplicate IO for triSurface.

- write STL triangle using common core routines from fileFormats

- last OpenDX release/news was from 2007.
  Cannot maintain or verify if the writers are correct.

Eg,
    librunTimePostProcessing.so
    librunTimePostProcessing.so.7 -> librunTimePostProcessing.so.7.1.0
    librunTimePostProcessing.so.7.1.0

- centralize handling of paraview/vtk versioning into wmake/cmakeFunctions

- add support for patch names in block mesh reader.

- as originally intended years ago, but never actually done.

- use 'foamPvCore' instead of 'vtkPVReaders' to avoid potential name
  collisions with any 'vtk*' files and since we may reuse these
  functions in other foam-paraview modules (not just readers).

STYLE: use same font size/colour for patch-names as for point-numbers

BUG: repair issue with single time-step

- paraview time-selector returns '0' as the requested time if there is
  only one time step. However, if we have skipped the 0/ directory,
  this single time step is likely a non-zero value.

- use "-pvMAJ.MIN" suffix for similarity with the paraview convention

- use sentinel file to ensure clean change of intermediate targets

- ensure all library files are being properly removed

- remove old (ParaView-3) files

- Works in 4.4.0, 5.0.1, 5.2.0 etc

STYLE:
- slots now use SM properties directly without a second lookup.
  This reduces exposure of the QT elements and simplifies the coding.

- avoid focus borders on the Qt elements

- place the "use Polyhedron" checkbox into a column

- move "Cache Mesh" down in the GUI (an advanced feature and thus
  should be less prominent)

- obtain button labels/tooltip directly from the XML content

- use property group customization instead of individual pqPropertyWidget

- although this is not the final desired form, since it uses
  individual pqPropertyWidget customizations (ie, ugly layout, too
  many bits of code), but is an interesting intermediate solution
  that may be useful in other contexts.

- provide headerType typedef in foamVtkFormatter, foamVtkOutput

- remove byteOrder and headerType constants from foamVtkFormatter
  since the same strings can also be obtained from foamVtkPTraits

- additional convenience methods in foamVtkFormatter

Enhancements

- introduce intermediate layer for base64 foamVtk formatting
- add encodedLength() method, which is useful for xml appended output

- misc improvements in functionality.

- no reason to use post-increment in forAll() macro.

- use C++11 cbegin()/cend() method names for forAll*Iter() macros.
  These method names have been in OpenFOAM since 2009 and are also
  used by C++11 containers.

STYLE: nullptr instead of 0 in UList

adding viewFactorWall to inGroups fixes #384

@Sergio

See merge request !91

Examples,

    wmakePrintBuild -plus

Check if value is known
(ie, everything configured and also OpenFOAM+):

    if wmakePrintBuild -plus >/dev/null 2>&1
    then
        echo YES
    else
        echo NO
    fi

Check if version is new enough

    if ofver=$(wmakePrintBuild -plus 2>/dev/null) && [ "$ofver" -ge 1612 ]
    then
        echo YES
    else
        echo NO
    fi

Conditionals

    ofver=$(wmakePrintBuild -plus 2>/dev/null)
    case "${ofver:=0}" in
    1612)
        echo "something for 1612
        ;;
    1706)
        echo "something for 1706
        ;;
    esac

- makes it easier to use as a wordHashSet replacement for situations
  where we want to avoid duplicates but retain the input order.

- support construction from HashTable, which means it works like the
  HashTable::sortedToc but with its own hashing for these keys.

- expose rehash() method for the user. There is normally no need for
  using it directly, but also no reason to lock it away as private.