Explicitly name derived fields to improve readability of diagnostic messages and avoid duplicate registration

Avoids problem of duplicate registration

twoPhaseEulerFoam/twoPhaseSystem/diameterModels/constantDiameter: Do not register the temporary diameter field

threePhaseInterfaceProperties: Update constructor to be consistent with the two-phase interfaceProperties
Avoids problem of duplicate registration of K

and generate cleaner HTML files.
Thanks to Bruno Santos for various fixes and improvements.
Resolves bug reports:
    http://www.openfoam.org/mantisbt/view.php?id=1516
    http://www.openfoam.org/mantisbt/view.php?id=1016
    http://www.openfoam.org/mantisbt/view.php?id=1512

Also moved global classes which should be in the Foam namespace into it.

Resolves bug-report http://www.openfoam.org/mantisbt/view.php?id=1514

turbulenceModels/RAS/SSG: Added Speziale, Sarkar and Gatski pressure-strain based Reynolds-stress turbulence model

Resolves bug-report http://www.openfoam.org/mantisbt/view.php?id=1511

Patches provided by Bruno Santos
Resolves bug-report http://www.openfoam.org/mantisbt/view.php?id=231

PolynomialEntry: Templated polynomial DataEntry to support all basic field types from scalar to tensor
This allows polynomial functions for e.g. velocity to be specified in the uniformFixedValue BC

Consider a linear function for Ux(t) with Uy and Uz = 0:

    inlet
    {
        type            uniformFixedValue;
        uniformValue    polynomial
        (
            ((10 0 0)   (0 0 0))
            ((100 0 0)  (1 0 0))
        );
    }

Resolves bug report http://www.openfoam.org/mantisbt/view.php?id=1508

Resolves bug-report http://www.openfoam.org/mantisbt/view.php?id=1201

plus support for other than integer types

primitiveMeshTools: stabilize with VSMALL rather than SMALL to avoid problems with very small meshes
Resolves bug-report http://www.openfoam.org/mantisbt/view.php?id=1509

Resolves bug-report http://www.openfoam.org/mantisbt/view.php?id=774

This version is very inefficient in parallel and does not provide the
-parallelSource or -parallelTarget options which will need to be
reinstanted in the future or we could revert mapFields to the
OpenFOAM-2.2 version.

Resolves bug-report http://www.openfoam.org/mantisbt/view.php?id=1506