- 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.

- make topoSet set/unset methods virtual to allow overloading

- old 'DELETE' enum was easily confused with 'REMOVE', which removes
  the set, not the elements from the set.

- provide corresponding subtractSet() method

STYLE: HashSet set/unset instead of insert/erase methods in topoSetSource

- simplifies switching to/from bitSet storage

- add intermediate classes topoSetCellSource, topoSetFaceSource,
  topoSetPointSource and corresponding New() factories

- Support specification with "patches" and "patch" keywords
  (similar to zone selection). Keyword "name" for compatibility.

- "boxes" has precedence over "box" (similar to treatment of "zones"
  vs "zone")

- replaces "centre", using the same keyword as other objects
  (eg, plane, rotatedBox, coordinateSystem etc).

- uses the keywords 'zones' and 'zone' to avoid potential conflicts
  with a named topoSet action, but accepts 'name' for compatibility.

Feature patch function1

See merge request OpenFOAM-plus!215

- catch some dictionary entries from pre-develop branch

- make hasFaceId a top-level virtual method and remove keepIds
  equivalent from sampledTriSurfaceMesh. This makes the property
  available without casting.

- New sampling type 'none'.
  Can be used to temporarily disable a sampling surface definition,
  or to provide boilerplate for overwriting later.

COMP: fix incorrect reference in meshedSurfRef

- as part of the cleanup of dictionary access methods (c6520033)
  made the dictionary class single inheritance from IDLList<entry>.

  This eliminates any ambiguities for iterators and allows
  for simple use of range-for looping.

  Eg,
      for (const entry& e : topDict))
      {
          Info<< "entry:" << e.keyword() << " is dict:" << e.isDict() << nl;
      }

   vs

      forAllConstIter(dictionary, topDict, iter))
      {
          Info<< "entry:" << iter().keyword()
              << " is dict:" << iter().isDict() << nl;
      }