- extend the sampling concept to include surfMeshes and surfFields
  for storage.

- Note the createOnRead switch in surfMeshSamplers can be desirable in
  some situations to force creation of the surface faces within the
  constructor.

- isolate the surface source (plane, iso-surface etc), from sampling

- all sampled surface types now consistently use the same storage,
  which allows some more simplifications in the future.

- before/after comparison of the sampledTriSurfaceMesh tested with
  motorbike passenger helmet (serial and parallel). Use the newly added
  'keepIds' functionality to retain the original ids, and can also
  compare them to the original obj file with "GenerateIds" in paraview.

- this makes it easier to reuse the code, and sampledSurface expect
  a face (not a labelledFace), so this also eliminates a translation
  level and simplifies memory management.

- before/after comparison of the sampled iso-surfaces tested with
  iso-surfaces from interFoam/RAS/angledDuct tutorial (serial and
  parallel)

- the configuration settings can be used for the third-party build,
  but the configuration is not yet actively enabled in
  etc/bashrc, etc/cshrc

- now defaults to 'log.$WM_OPTIONS' (eg, log.linux64GccDPInt32Opt)
  for more clarity and fewer potential name clashes when building
  multiple versions.

- additional surface and surfaceAndDirection modes

- currently only 'none' or 'sqrt', which can be useful in combination
  with integrate or averaging functions.

  - fieldAverage
  - mag
  - magSqr
  - readFields
  - fieldsExpression (add, subtract)

- similar to functionality available for IOobjectList, objectRegistry

- was using the ids coming from the zones instead of the sorted order
  from ensightFaces, which led to a clash in the mesh point maps that
  were manifest as a jumbled order.

BUG: missing newlines in foamToEnsight nfaced/nsided ASCII output

- was correct for foamToEnsightParts, but not for foamToEnsight

--
* Many thanks to Justin Graupman for all of his testing,
  which has been a great help in isolating and fixing various issues.

ENH: reduce number of variables, simplify code

- Note: use boolList instead of scalarList for managing the face signs
  since its lazy evaluation can be convenient when sign information is
  not required.

This is part of #340.

New feature extract eulerian particles

New functionality to extract particle data from multiphase calculations and replay the data in lagrangian cases, using both the raw input particle data, and data processed into a (smaller) set of injection locations.

See merge request !82

ENH: Added tutorials to show extraction of particle data from eulerian cases and subsequent injjection via lagrangian cases

Description
    Replays an set of particle data based on an injectedParticleCloud,
    using the assumption of one particle per parcel.

Usage
    \verbatim
    model1
    {
        type            injectedParticleInjection;
        SOI             0;
        massTotal       0; // Place holder only
        parcelBasisType fixed;
        nParticle       1; // 1 particle per parcel
        cloud           eulerianParticleCloud;
        positionOffset  (-0.025 2 -0.025);
    }
    \endverbatim

Description
    Interrogates an injectedParticleCloud to convert the raw particle
    data into a set of 'binned' injectors.

    The bins are set according to the particle \c tag property, from which:
    - diameters are converted into \c general distributions with a
      user-specified bin width
    - raw velocity and diameter data are resampled and stored to provide
      variations per injector

    The mass to inject can be set according to the raw input data mass total
    by using the \c applyDistributionMassTotal switch

Usage
    \verbatim
    model1
    {
        type            injectedParticleDistributionInjection;
        SOI             0;
        parcelBasisType mass;
        cloud           eulerianParticleCloud;
        positionOffset  (-0.025 2 -0.025);
        binWidth        0.1e-3;
        parcelsPerInjector 500;
        resampleSize    100;                    // optional
        applyDistributionMassTotal yes;

        // Placeholder only when using applyDistributionMassTotal
        massTotal       0;
    }
    \endverbatim

Note
    The each injector location is assumed to be operating under steady
    conditions, i.e. using a constant flow rate profile

SourceFiles
    InjectedParticleDistributionInjection.C

See also
    Foam::injectedParticle
    Foam::injectedParticleCloud
    Foam::functionObjects::extractEulerianParticles
    Foam::distributionModels::general

Pstream: added maxCommsSize setting to do (unstructured) parallel transfers in blocks.

Tested:
- with maxCommsSize 0 produces exactly same result as plus.develop
- compiles with label64
- with maxCommsSize e.g. 3 produces exactly same result as plus.develop
- with maxCommsSize=0 exactly the same messages (with Pstream::debug = 1) as plus.develop

See merge request !85

Applies a displacementLaplacian on top of a solid-body motion function

ENH: Usage of locationsInMesh for tutorial and other fix

- Example for Using multiple locations in mesh
- bugFix for rhoPimpleFoam case

See merge request !86