- tie the MPI rules to the base compiler type *without* its version.
  Eg, linux64Gcc (which exists) instead of linux64Gcc81

- this corresponds to what various module or build systems provide.
  ThirdParty builds are unaffected since they install into FOAM_EXT_LIBBIN

- Follow similar pattern as per boost/CGAL with the '*-none' to disable,
  and '*-system' for system installations.

  Also support central non-ThirdParty installations by specifying the
  version as "*-system", but also providing the fully qualified
  *_ARCH_PATH too.

--
ENH: Verify label and scalar sizes used in the metis header.

- ensure they match with expected values, which can be obtained via
  the OpenFOAM definitions for WM_LABEL_SIZE and WM_PRECISION_OPTION

- Only reference the FOAM_EXT_LIBBIN locations when linking.
  The respective SCOTCH_ARCH_PATH/lib, METIS_ARCH_PATH/lib locations
  either do not exist, or are possibly inconsistent and won't be
  seen at run-time anyhow.

- Incorporate decompose/metisDecomp/Allwmake into the top-level
  decompose/Allwmake

Patch contributed by Bruno Santos
Resolves patch request http://bugs.openfoam.org/view.php?id=2212

- place under $WM_THIRD_PARTY_DIR/lib/$WM_OPTIONS
- relocate FOAM_MPI_LIBBIN accordingly

- for future updates of scotch, need to edit these two files:

    OpenFOAM-<VERSION>/src/parallel/decompose/Allwmake
    ThirdParty-<VERSION>/Allwmake

The dummyThirdParty tree builds libraries which are drop-in
(but non-functional) versions of some thirdparty libraries. This will
make it easier to ship binary versions without having to ship thirdparty packs.

Scotch is now built using its own build system which builds
an additional metis.h which conflicts with the metis one so
to have separate include directory settings we also need separate
Make/ structures.

- in preparation for adding an optional '-reconstruct' to a few utilities
  re-use as -lreconstruct library

- move related stuff there too
      src/decompositionMethods/decompositionMethods
      -> src/parallel/decompositionMethods

- added missing namespace qualifiers

This reverts commit a2135375.

This reverts commit d4a7173f.

Still a problem!

This reverts commit 5050e9e6.

-lrt nor needed in src/decompositionMethods/decompositionMethods/Make/options

Adding -lrt to decompositionMethods/decompositionMethods/Make/options
to get rid of get_clocktime error.

openSUSE 11.1.  Added 20 to the template depth for all architectures for CGAL.

Changed WM_THIRD_PARTY to WM_THIRD_PARTY_DIR and added to all 'options' files that use third-party software.