- add note in BuildIssues about the I_MPI_CC variable, which is needed
  when building with Intel-MPI and gcc/clang.

  This additional setting is needed since the changes needed to solve
  the issue of building scotch with Intel-MPI and icc (issue #434)
  means that mpiicc is now being used as the wrapper when compiling
  scotch.

- have the FOAM_MPI short name for INTELMPI start with 'impi-' instead
  of just the version number.
  Intel-MPI is often installed as /opt/intel/impi/4.1.3.049, which
  results in 'FOAM_MPI=4.1.3.049' and the mpi flavour is lost.
  Prefix these cases with 'impi-'

- Added for transition purposes only in 1612 but can now be removed.

Feature post release cleaning

See merge request !123

- a holdover from OpenFOAM 1.4 (prior to the #include dictionary directive)

Feature post release cleaning

See merge request !122

- as of v1706
  extractFromSurfaceCoeffs { ... } is an optional subdictionary

- replace duplicate code with global bounds enums and Enum

- if the enum name is not found, then warn and return the default.

- use typedefs and new features/methods
- file-scope template to avoid code duplication.

- make the purpose of various parts clearer

- can now suppress prefixing an underscore to leading digits.

- allows configuration without an environment variable.
  For compatibility still respect FOAM_SIGFPE and FOAM_SETNAN
  env-variables

- The env-variables are now treated as true/false switch values.
  Previously there was just a check for env exists or not, but this
  can be fairly fragile for a user's environment.

- allows configuration without an environment variable.
  For compatibility still respect MPI_BUFFER_SIZE env-variable.

ENH: add degToRad() multiplier (useful for scalar fields)

- use degToRad() functions throughout instead of scattered local solutions

- use 1024 instead of 1000 since it will be changed internally to 1024 anyhow.

- use separate constructor for ignore-case option (cf. wordRe treatment)

- constructors/destructor now inline.

- make some IOobject writing routines non-templated.

- relocate more IOobject methods into the IOobjectI.H
  (generally cleanup the main header).

- avoid loading surface fields if there are no faceZones

- avoid pointMesh if there are no appropriate point fields