- handle tmp fields in interpolate methods

- special method interpolateInternal() for creating a volume field
  with zero-gradient treatment for patches from an internal field.

  This method was previously also called interpolate(), but that
  masked the ability to subset the internal field only.

  Ensight output needs the volume field:
      uses interpolateInternal().

  VTK output has separate handling of internal and patch fields:
      uses interpolate().

ENH: added fvMeshSubset mesh() method for baseMesh or subMesh.

- simplies coding when the fvMeshSubset may or may not be in active use.

ENH: update foamToEnsight to use newer methods in wrapped form

- static interpolate functions with renaming for manual use with
  fvMeshSubset (when fvMeshSubsetProxy may be too limiting in
  functionality)

the actuation disk FO

- helps reduce clutter in the topoSetDict files.

  Caveats when using this.

  The older specification styles using "name" will conflict with the
  set name. Eg,

    {
        name    f0
        type    faceSet;
        action  add;
        source  patchToFace;
        sourceInfo
        {
            name   inlet;
        }
    }

    would flattened to the following
    {
        name    f0
        type    faceSet;
        action  add;
        source  patchToFace;
        name   inlet;
    }
    which overwrites the "name" used for the faceSet.

    The solution is to use the updated syntax:

    {
        name    f0
        type    faceSet;
        action  add;
        source  patchToFace;
        patch   inlet;
    }

- faceBitSet, pointBitSet and faceBoolSet (similar to cellBitSet)
  * allows topo sources in a wider variety of places.
  * With copy or move constructors.

- cylinderToPoint, searchableSurfaceToFace, searchableSurfaceToPoint,
  sphereToFace, sphereToPoint sources

- optional innerRadius for sphere and cylinder sources to treat as hollow.

- support "sets" as well as "set" for cellToCell, faceToFace... sources.

  * convenience and avoids writing the set during processing.

- Standard known field types in Foam::fieldTypes namespace

- permits use of these checks for routines wishing to handle their own
  logic.

- now applicable to labelLists.

Note:
  in some situations it will be more efficient to use
  Foam::identity() directly. Eg,

     globalIndex globalCells(mesh.nCells());
     ...
     labelList cellIds
     (
         identity(globalCells.localSize(), globalCells.localStart())
     );

- this helps for trapping unguarded dictionary lookups.

- The change from "solver" to "motionSolver" has not been
  applied consistently for all types of motion solvers.

- previously simply read files until the input stream went bad and no
  more lines could be read.  With the more stringent checking of
  values read (commit 0ce7e364) this approach causes problems.

  Use the underlying tokenizer instead to decide about termination.

- SubField<vector> vs Field<vector>

- for space-savings the VTK fields are normally written as 'float'
  rather than double. When a double field contains very large values,
  these can result in a overflow when converted to float.

  Now trap these with the appropriate numeric limits.
  No warning when these values are clipped: it should be readily
  apparent from the output.

ENH: handle symmTensor component swapping directly on VTK output.

- use VTK output routines in vtkSurfaceWriter to benefit from the
  above changes

- a failed attempt to read a value (eg, word, label, scalar) from a
  stream now always provokes a FatalIOError.
  This helps avoid some difficult to trace input errors.

- preliminary work to #1057

- add dictionary selectable format (ascii|binary) to
  VTKsurfaceFormat, VTPsurfaceFormat

Feature topo set improvements (issue #1060)

See merge request OpenFOAM-plus!216

type sampled is the equivalent of 'mappedField' bc
functionality - it samples a registered field on a
different region/patch/cells.