- regularise referencing of OpenFOAM env variables, sources etc.

CONFIG: cmake targets are globally unique

- unify CMakeLists naming and align content

- they don't use scotch/metis anyhow, which are the only things
  placed in FOAM_EXT_LIBBIN

- as originally intended years ago, but never actually done.

- use 'foamPvCore' instead of 'vtkPVReaders' to avoid potential name
  collisions with any 'vtk*' files and since we may reuse these
  functions in other foam-paraview modules (not just readers).

STYLE: use same font size/colour for patch-names as for point-numbers

BUG: repair issue with single time-step

- paraview time-selector returns '0' as the requested time if there is
  only one time step. However, if we have skipped the 0/ directory,
  this single time step is likely a non-zero value.

- use "-pvMAJ.MIN" suffix for similarity with the paraview convention

- use sentinel file to ensure clean change of intermediate targets

- ensure all library files are being properly removed

- remove old (ParaView-3) files

- Works in 4.4.0, 5.0.1, 5.2.0 etc

STYLE:
- slots now use SM properties directly without a second lookup.
  This reduces exposure of the QT elements and simplifies the coding.

- avoid focus borders on the Qt elements

- place the "use Polyhedron" checkbox into a column

- move "Cache Mesh" down in the GUI (an advanced feature and thus
  should be less prominent)

- obtain button labels/tooltip directly from the XML content

Resolves bug-report http://bugs.openfoam.org/view.php?id=2372

Patch contributed by Bruno Santos
Resolves bug-report http://bugs.openfoam.org/view.php?id=2192

- remove old VTK_CONVEX_POINT_SET code, since VTK_POLYHEDRON exists
  since several years

ENH: improve robustness of paraFoam script

- only check the relevant plugin types,
  fallback to native reader if needed/possible.

PV4FoamReaders: Updated to build with ParaView-5.0.0
paraFoam: Updated to load PV4FoamReaders for ParaView-5.0.0

Currently this is experimental but if it becomes clear that ParaView-4
and ParaView-5 are and will remain consistent with respect to readers
the plan is to rename

PV4 -> PV

or

PV4 -> PV45 if it is assumed that PV6 may need to be different.

The c++0x is used rather than c++11 to support gcc-4.5.?

To compile with 64bit labels set

WM_LABEL_SIZE=64

in ~/OpenFOAM/dev/prefs.sh

source ~/.bashrc

then Allwmake in OpenFOAM-dev.

This will build into for example OpenFOAM-dev/platforms/linux64ClangDPInt64Opt

If WM_LABEL_SIZE is unset or set to 32:

WM_LABEL_SIZE=32

the build would be placed into OpenFOAM-dev/platforms/linux64ClangDPInt32Opt

Thus both 32bit and 64bit label builds can coexist without problem.

The default ParaView is now 4.0.1 pending completion of testing of 4.1.0

- Show Point Numbers as is_internal="1" and hook directly into a QT-checkbox
  and thus bypass modifying the reader state.

- Same for Cache Mesh and Show Patch Names

- remove patch/point text labels upon deletion

- combined client/server plugin instead of separate .so files
  first experiment with adding panel decorations

- directory reorganization