Resolves bug-report http://openfoam.org/mantisbt/view.php?id=1579

Also corrected names of other fields

to avoid excessive pressure/buoyancy balance errors on non-orthogonal meshes

twoPhaseEulerFoam JohnsonJacksonFrictionalStress: alphaDeltaMax now user input (previously hard-coded to 5e-2)

to avoid excessive pressure/buoyancy balance errors on non-orthogonal meshes
Resolves bug-report http://openfoam.org/mantisbt/view.php?id=1379

Allows the specification of a reference height, for example the height
of the free-surface in a VoF simulation, which reduces the range of p_rgh.

hRef is a uniformDimensionedScalarField specified via the constant/hRef
file, equivalent to the way in which g is specified, so that it can be
looked-up from the database.  For example see the constant/hRef file in
the DTCHull LTSInterFoam and interDyMFoam cases.

Resolves bug-report http://www.openfoam.org/mantisbt/view.php?id=1573

Disadvantage is that the BC values have to be specified in terms of hU
rather than U.  The alternative would be to add complex code to map h
and U BCs into the equivalent for hU.
Resolves bug-report http://www.openfoam.org/mantisbt/view.php?id=1566

Revert changes in tutorial to correspond to the version in OpenFOAM-2.1.x
Resolves bug-report http://openfoam.org/mantisbt/view.php?id=1207

between liquid and solid mixture composition and the specie lists
defined in the thermodynamics package.

Note this does not change the current limitation that both liquid and
solid mixtures contain ALL the corresponding phase species defined in
the thermodynamics package.  However, missing species are included
automatically during construction of phaseProperties.

This hack will be removed when the rewrite of the parcel thermodynamics is complete.

Resolves bug-report http://www.openfoam.org/mantisbt/view.php?id=1552

tutorials/compressible/sonicDyMFoam/movingCone: sonic version of the pimpleDyMFoam/movingCone tutorial

tutorials/multiphase/interDyMFoam/ras/floatingObject: Update to demonstrate MULES with Crank-Nicolson

Uses a form of the Euler equation in which only variation along the streamlines is considered

Resolves bug-report http://www.openfoam.org/mantisbt/view.php?id=1543

Resolves bug-report http://www.openfoam.org/mantisbt/view.php?id=1541

tutorials/compressible/rhoPorousSimpleFoam/angledDuctImplicit: simplify rhoMax and rhoMin specification

potentialFoam: Solve for velocity potential named Phi rather than using the pressure field for this purpose

The Phi field is read if available otherwise created automatically with
boundary conditions obtained automatically from the pressure field if
available (with optional name) otherwise inferred from the velocity
field.  Phi Laplacian scheme and solver specification are required.  See
tutorials for examples.

tutorials/heatTransfer/chtMultiRegionSimpleFoam/heatExchanger/system/air/topoSetDict.1: further correction to avoid duplicate registration

tutorials/lagrangian/reactingParcelFilmFoam/hotBoxes/patchifyObstacles: another change to avoid duplicate registration