2)Adapting divU in TEqn.H for compressibleInterDyMFoam and compressibleInterFoam
3)Re-instated sixDoFRigidBodyDisplacement as patch for pointFields. It allows to use a different fvDynamincMesh type
independently of the BC's

- these are compile-time constants and can be marked as such in C++11.

ENH: noiseModels - updated parallel usage (no longer needs proc dirs) and apply input data validation

Revert "sixDoFRigidBodyDisplacementPointPatchVectorField, uncoupledSixDoFRigidBodyDisplacementPointPatchVectorField: removed"

This reverts commit 942338b0.

COMP: unitConversion - using M_PI instead of pi to avoid compiltion error due to pi not evaluating to a constexpr

Feature surface feature extract

See merge request !110

ccm conversion bugfixes

See merge request !115

- was generally somewhat fragile. The main problem stems from the fact
  that several interfaces may be attached to a boundary. No trivial
  means of solving this without too much work for a feature that is only
  "nice-to-have".

- Programming convenience.
  Eg, cos(45_deg) vs cos(degToRad(45))

STYLE: conversions marked as constexpr and noexcept

- makes it possible to use list types other than UList.
  For example, UIndirectList<point>

- not yet release, but some of the API and file locations are closer
  to 1706 than to 1612. Needed, for example, for swak4foam.

- eg, swak4Foam uses it for NumericAccumulationNamedEnum

- allows simultaneously reordering and truncation of lists

STYLE: add const ref for UnaryPredicate parameter

 - "single" = One region for all files
 - "file"   = One region for each file
 - "offset" = Offset regions per file
 - "merge"  = Merge regions by name

These specifications provide finer control when loading multiple
surfaces.