This was causing same event number on both U and grad(U) which meant
that if one of the processors had different event number the trigger
of gradient caching would not be synchronised. Now instead the overflow
is detected in the regIOobject::upToDate function and handled consistently
(by assuming that the events of object will never differ by more than
labelMax/2)

Conflicts:
	src/OpenFOAM/db/regIOobject/regIOobject.C

Feature utils

Updated utilities bases on our internal development line

Still to do:
- update ParaView module builds to build alongside standard OpenFOAM code in separate directory

See merge request !21

ENH: applyBoundaryLayer - determine compressibility automatically by the presence of a thermophysicalProperties file

- Initial code supplied by CFD+Engineering
- Refactored and integrated into the code by OpenCFD

Feature turbulence

Integration of new kOmega SST turbulence model variants: DES, DDES, IDDES

Initially supplied by CFD Software E+F GmbH



See merge request !20

ENH: Added new ceeateZeroDirectory utility

Uses a system/caseProperties file to select templates from
etc/caseDicts/createZeroDirectoryTemplates to enable high-level setup
of a case.
See
- etc/caseDicts/createZeroDirectoryTemplates
- tutorials/preProcessing/createZeroDirectory

See merge request !19

- Initial code supplied by CFD Software E+F GmbH
- Refactored and integrated into the new templated Turbulence structure
  by OpenCFD

References:

- kOmegaSSTDES model:
  Strelets, M. (2001)
  Detached Eddy Simulation of Massively Separated Flows,
  39th AIAA Aerospace Sciences Meeting and Exhibit, Reno, NV

- kOmegaSSTDDES model:
  Gritskevich, M.S., Garbaruk, A.V., Schuetze, J., Menter, F.R. (2011)
  Development of DDES and IDDES  Formulations for the k-omega
  Shear Stress Transport Model, Flow, Turbulence and Combustion,
  pp. 1-19

- kOmegaSSTIDDES model:
  Gritskevich, M.S., Garbaruk, A.V., Schuetze, J., Menter, F.R. (2011)
  Development of DDES and IDDES Formulations for the k-omega
  Shear Stress Transport Model, Flow, Turbulence and Combustion,
  pp. 1-19

Uses a system/caseProperties file to select templates from
etc/caseDicts/createZeroDirectoryTemplates to enable high-level setup
of a case.
See
- etc/caseDicts/createZeroDirectoryTemplates
- tutorials/preProcessing/createZeroDirectory

It was not correctly interpolating faceZones which are on processor boundaries.
This caused difference between serial and parallel running. Fixes #16.

Included option to use the low Reynolds number correction, with a
default value of 'on'.  Further details can be found in the reference:

    Spalart, P. R., Deck, S., Shur, M.L., Squires, K.D., Strelets, M.Kh,
    Travin, A. (2006).
    A new version of detached-eddy simulation, resistant to ambiguous grid
    densities.
    Theor. Comput. Fluid Dyn., 20, 181-195.

Set using the entry:

    lowReCorrection on; // off

Some bcs (e.g. humidity) use an external transported field so this needs
to be registered asap.

ENH: foamHelp - added support for solvers

- Added support for solvers
- Updated use of FOAM_ABORT - old code left commented in helpBoundary.C for now...

See merge request !18

Feature turbulence

Turbulence updates from our internal development line:
- Added DESModel base class for DES models
- Moved DES models to separate DES directory
- Added DESModelRegions function object
- Updated porousBafflePressure BC to use DataEntry class for D and I inputs
- Documentation updates

See merge request !17

For distributed data + running redistributePar some of the processors
might not have level0Edge. In this case the sync() routine should
fix this but it does require at least the master to have valid data.

- Initial code supplied by CFD Software E+F GmbH
- Refactored and integrated into the new templated Turbulence structure by
  OpenCFD
- To use the new convection scheme, add the library
  libturbulenceModelSchemes.so to the $FOAM_CASE controlDict

Object generates an indicator field for DES turbulence models to show
in which regions LES or RAS modelling is active.