- In the foundation version they introduced a construct to handle
  the transition from 'wmRefresh' as an alias to 'wmRefresh' as
  a shell function. This transition is unnecessary for OpenFOAM+
  since 1606 used wmREFRESH (not wmRefresh) as an alias.

  For portability it is important to avoid this non-POSIX
  "type -t". It causes issues with dash and with zsh
  (mentioned in issue #277).

        type -t dash  ->   -t: not found
        type -t zsh   ->  zsh: bad option: -t

Note: zsh users may still noticed other problems.
For example, the POSIX 'unset -f' normally has no output, but in zsh
it reports an error and has exit code 1 if the function was not
previously defined. Whereas in POSIX (including bash, dash) it only
returns non-zero if the name(s) could not be unset.

Patch contributed by Bruno Santos
Resolves bug-report http://bugs.openfoam.org/view.php?id=2285

- instead we use the CGAL settings directly since they have the
  same option of (version | system | none)

- may wish to review this again in the future.

Patch provided by Mattijs Janssens
Resolves bug-report http://bugs.openfoam.org/view.php?id=2240

Patch provided by Bruno Santos
Resolves bug-report http://bugs.openfoam.org/view.php?id=2051

Resolves bug-report http://bugs.openfoam.org/view.php?id=2223

  - "$FOAM_USER_APPBIN" and "$FOAM_USER_LIBBIN" have been added to
    "foamOldDirs" in "etc/bashrc" and "etc/config.sh/unset"

  - "$OPAL_PREFIX" is now undefined in the option "SYSTEMOPENMPI" within
    "etc/config.sh/mpi", but only if the path defined in this variable
    is cleaned when using "foamCleanPath".

  - "$OPAL_PREFIX" is now also conditionally undefined in
    "etc/config.sh/unset" when the path is picked up by "foamCleanPath".

Patch contributed by Bruno Santos
Resolved bug-report http://bugs.openfoam.org/view.php?id=2210

surfaceRegion will be the name of a class to provide support for surface
region selection.

Renamed the original volRegion -> volFieldValue to clarify the purpose
of this class to process vol fields on a volRegion.

The change from C++0x to C++11 allows all of C++11 functionality to be
used in OpenFOAM, in particular constructor delegation which avoids code
duplication or constructor helper functions.  However, this also means a
change to the minimum gcc version supported which is now 4.7 rather than
4.5.

Note that gcc-4.7 does not support the entire C++11 standard but does
support all of the functionality currently needed for further OpenFOAM
development.  The minimum gcc-version which supports the entire C++11
standard is 4.8 which is now the recommended minimum gcc version.

- these frontends are defunct and their formats were quite a mess.
  Prostar 4 versions (star4ToFoam, foamToStarMesh) should be used
  instead.

Now reduced to 3 environment variables:
    ParaView_DIR         - paraview installation directory
    ParaView_INCLUDE_DIR - paraview include directory
    PV_PLUGIN_PATH       - paraview plugin directory for OpenFOAM modules

Previously also had (ParaView_MAJOR, ParaView_VERSION).

ThirdParty makeParaView adjusted accordingly.

ENH: improved configuration possibility for non-ThirdParty paraview
installation.

BUG: csh foamPV alias was completely incorrect.

- export/setenv WM_COMPILER_TYPE as suggested by Mattijs.

- for overall consistency, don't carp about an unset WM_COMPILER_TYPE,
  since this would only be on the first instance (prior to the
  export/setenv) and would be confusing about why/when this message
  may occur.

- reduce clutter: only use (system|ThirdParty) for WM_COMPILER_TYPE.
  Drop the old 'OpenFOAM' setting for WM_COMPILER_TYPE, which was
  transitional in early 2011.

- make the error messages more meaningful

- many systems may not have boost or FFTW installed, or in an older
  version. Using ThirdParty for them should lead to a more robust
  build process.

- triggered by dash.

- gcc/g++ always being used

STYLE: spurious unsetenv WM_COMPILER_TYPE (csh only)

- more stringent cleanup of ThirdParty settings for wmUNSET

functionObjects::XiReactionRate: Writes the turbulent flame-speed and reaction-rate volScalarFields for the Xi-based combustion models

Replaces the obsolete and 'wdot' utility.

postProcess -func writeCellCentres

- in 3rd-party we always build into lib$WM_COMPILER_LIB_ARCH and
  thus only need this one in LD_LIBRARY_PATH.

- move unset mpi buffer size from config.csh/settings -> config.csh/mpi

- wmUNSET now also unalias wmREFRESH

Note: unsetenv WM_COMPILER_TYPE in csh variant?

- drop reference to paraview-3 in config files.
  Cannot say anything definite about support for versions
  this old (2012)