The implementation now correspond to the definitions in the readily
available reference:

http://personalpages.manchester.ac.uk/staff/david.d.apsley/specturb.pdf

in which a large number of linear and non-linear models are presented in
a clean and consistent manner.  This has made re-implementation and
checking far easier than working from the original references which anyway
are no longer available for the LienCubicKE and ShihQuadraticKE models.

Also use the innerSqr function where appropriate

which takes the inner product of a symmTensor with itself and returns a symmTensor

Resolves bug-report http://openfoam.org/mantisbt/view.php?id=1548

Resolves bug report http://www.openfoam.org/mantisbt/view.php?id=1450

Proposed resolution of http://www.openfoam.org/mantisbt/view.php?id=1509

off-centre coefficient and the coefficient for the implicit part

Resolves issues with probes and findRefCell for meshes in which all cell face-pyramids are positive.

Resolves bug-report http://openfoam.org/mantisbt/view.php?id=1348

Tested with snapshot gcc-5-20150215.tar.bz2

tutorials/compressible/sonicDyMFoam/movingCone: sonic version of the pimpleDyMFoam/movingCone tutorial

tutorials/multiphase/interDyMFoam/ras/floatingObject: Update to demonstrate MULES with Crank-Nicolson

Now using memory offsets to calculate transfer block sizes rather than
sum of 'sizeof' to ensure word alignment is accounted for

Resolves bug-report http://www.openfoam.org/mantisbt/view.php?id=1545