Correcting header in tabulatedNTUHeatTransfer from fileName to file

radiationProperties: general model organization
fvOptions: taking out the use of pressureJumpDirec.... from tutorial

ENH: Adding humidityTemperatureCoupledMixed BC and directionalPressureGradientExplicitSource and the corresponding tutorial
tutorials/heatTransfer/chtMultiRegionFoam/windshieldCondensation

by introducing rational base-classes rather than using the hideous
'switch' statement.  Further rationalization of the cell-selection
mechanism will be implemented via an appropriate class hierarchy to
replace the remaining 'switch' statement.

Mesh-motion is currently handled very inefficiently for cellSets and not
at all for inter-region coupling.  The former will be improved when the
cell-selection classes are written and the latter by making the
meshToMesh class a MeshObject after it has been corrected for mapFields.

fvOptions does not have the appropriate structure to support MRF as it
is based on option selection by user-specified fields whereas MRF MUST
be applied to all velocity fields in the particular solver.  A
consequence of the particular design choices in fvOptions made it
difficult to support MRF for multiphase and it is easier to support
frame-related and field related options separately.

Currently the MRF functionality provided supports only rotations but
the structure will be generalized to support other frame motions
including linear acceleration, SRF rotation and 6DoF which will be
run-time selectable.

At the specie level:
    hs = sensible enthalpy
    ha = absolute (what was total) enthalpy
    es = sensibly internal energy
    ea = absolute (what was total) internal energy

At top-level
    Rename total enthalpy h -> ha
    Rename sensible enthalpy hs -> h

Combined h, hs, e and es thermo packages into a single structure.

Thermo packages now provide "he" function which may return either enthalpy or
internal energy, sensible or absolute according to the run-time selected form

alphaEff now returns the effective diffusivity for the particular energy which
the thermodynamics package is selected to solve for.