- char instead of integer representation for the enumeration.

- additional constructor as lookupOrDefault from dictionary entry.

- improve doxygen entries for searchable surfaces.

- support selection of searchable surfaces with shorter names.
  Eg,
      type   box | cylinder | ...;
  vs  type   searchableBox | searchableCylinder | ...;

- was superseded by "libs" in 1612

- was replaced with "name" in 1706

- stricter checking for common dictionary input errors such as a
  missing ';' for primitive entries, extra or missing closing '}' etc.

- use "min:xxx" format for AMIInterpolation as well

- relocate some standard functionality to TimePaths to allow a lighter
  means of managing time directories without using the entire Time
  mechanism.

- optional enableLibs for Time construction (default is on)
  and a corresponding argList::noLibs() and "-no-libs" option

STYLE:

- mark Time::outputTime() as deprecated MAY-2016

- use pre-increment for runTime, although there is no difference in
  behaviour or performance.

Merge branch 'develop-pre-release' of develop.openfoam.com:Development/OpenFOAM-plus into develop-pre-release

- the backend script should not be accessible from the PATH.
  Using deprecated/ adds a level of documentation.

- functionObjectLibs -> libs
- redirectType -> name
- change deprecated writeCompression flags types to Switch.

- cleanup some trailing ';;' from some dictionaries

STYLE: separate areaNormal/unitNormal method for primitives (issue #885)

See merge request OpenFOAM-plus!208

- regularise referencing of OpenFOAM env variables, sources etc.