Merge branch 'merge-foundation' of develop.openfoam.com:Development/OpenFOAM-plus into merge-foundation

Change boundaryRadiationProperties and boundaryRadiationPropertiesPatch to mesh object and changing tutorials accordingly

Merge branch 'merge-foundation' of develop.openfoam.com:Development/OpenFOAM-plus into merge-foundation

BUG: boundaryRadiationProperties - updated to use caseConstant() for parallel usage and updated style

Merge branch 'merge-foundation' of develop.openfoam.com:Development/OpenFOAM-plus into merge-foundation

Resolves bug-report http://www.openfoam.org/mantisbt/view.php?id=2062

Resolves bug-report http://openfoam.org/mantisbt/view.php?id=2061

Resolves bug-report http://www.openfoam.org/mantisbt/view.php?id=2060

Now the calculation of the 2nd-invariant is more efficient and
accumulates less round-off error.

Resolves bug-report http://www.openfoam.org/mantisbt/view.php?id=2059

ENH: cyclicAMI: added 'method' specification



See merge request !31

Old:
- Previous versions created k and epsilon fields by default, and
  then processed omega and nuTilda fields if present.
- Depending on the choice of turbulence model, not all of these fields
  would be used, and could lead to errors when running some utilities
  due to erroneous values.
- If the omega field did not exist, it would be derived from the epsilon
  field, and also inherit the epsilon boundary conditions (wall
  functions)

New:
- This version will only update fields that already exist on file, i.e.
  will not generate any new fields, and will preserve the boundary
  conditions