Declaration of 'explicit' constructor without a single argument are redundant.

    Corrected form of the Rosin-Rammler distribution taking into account the
    varying number of particels per parces for for fixed-mass parcels.  This
    distribution should be used when
    \verbatim
        parcelBasisType mass;
    \endverbatim

    See equation 10 in reference:
    \verbatim
        Yoon, S. S., Hewson, J. C., DesJardin, P. E., Glaze, D. J.,
        Black, A. R., & Skaggs, R. R. (2004).
        Numerical modeling and experimental measurements of a high speed
        solid-cone water spray for use in fire suppression applications.
        International Journal of Multiphase Flow, 30(11), 1369-1388.
    \endverbatim

    The operation can be applied to any volume or surface fields generating a
    volume or surface scalar field.

    Example of function object specification:
    \verbatim
    Ttot
    {
        type            add;
        libs            ("libfieldFunctionObjects.so");
        fields          (T Tdelta);
        result          Ttot;
        executeControl  writeTime;
        writeControl    writeTime;
    }
    \endverbatim

Also refactored functionObjects::fieldsExpression to avoid code
duplication between the 'add' and 'subtract' functionObjects.

    The operation can be applied to any volume or surface fields generating a
    volume or surface scalar field.

    Example of function object specification:
    \verbatim
    Tdiff
    {
        type            subtract;
        libs            ("libfieldFunctionObjects.so");
        fields          (T Tmean);
        result          Tdiff;
        executeControl  writeTime;
        writeControl    writeTime;
    }
    \endverbatim

Patch contributed by Timo Niemi, VTT.
Resolved bug-report http://bugs.openfoam.org/view.php?id=2286

viscosityModels::strainRateFunction: New run-time selected strain-rate function non-Newtonian viscosity model

Uses 'Function1' to provide support for an extensible range of run-time
selected functions including interpolation of tabulated data etc.

Resolves bug-report http://bugs.openfoam.org/view.php?id=2333

and other incompressible mixture-based multiphase solvers.

The spherical part of the Reynolds stress is included in the pressure so
that the wall boundary condition for the pressure is zeroGradient.

Resolves bug-report http://bugs.openfoam.org/view.php?id=2325

when Allwmake is called from wmake -all

Avoids a lot of unnecessary clutter in the compilation log.

Changed 'ld' line to include path of target library or executable.

'set -x' should be used for debugging.

Added command printing into wmake and Allwmake as a replacement for
'set -x' to log current target.

Based on patch contributed by Alexey Matveichev
Resolves feature request http://bugs.openfoam.org/view.php?id=2328

Based on patch contributed by Alexey Matveichev
Resolves feature-request http://bugs.openfoam.org/view.php?id=2330

The base-class provides the point for single-precision.

The 'Refresh' button updates the blockMesh and the GUI.

Patch contributed by Mattijs Janssens

Added the interfacial pressure-work terms according to:

Ishii, M., Hibiki, T.,
Thermo-fluid dynamics of two-phase flow,
ISBN-10: 0-387-28321-8, 2006

While this is the most common approach to handling the interfacial
pressure-work it introduces numerical stability issues in regions of low
phase-fraction and rapid flow deformation.  To alleviate this problem an
optional limiter may be applied to the pressure-work term in either of
the energy forms.  This may specified in the
"thermophysicalProperties.<phase>" file, e.g.

pressureWorkAlphaLimit 1e-3;

which sets the pressure work term to 0 for phase-fractions below 1e-3.

For particularly unstable cases a limit of 1e-2 may be necessary.

The best of the current options is to use the latest version of
exuberant ctags (which has a new C++ parser) to generate both
declaration and definition tags.

gtags works to some extent and provides additional information about the
function signatures but the C++ parser is not accurate and misses scope
information.  gtags can be used with the ctags parser which is effective
but looses the primary advantage of gtags being able to provide function
signatures so support has been switched-off by default.

ebrowse does not appear to be very useful for traversing the OpenFOAM
class tree and the support has been switched-off by default.

This reverts commit f7996e45.