which need this functionality.  Solvers will now check the correctness of the BCs on
read.

This reverts commit ff5137e4.
But keeps (cosmetic) changes to bin/foamCleanPath

- this was not agreed.

This reverts commit 41b196ff.

- old-style (left untouched for now):
  app, lib, run, sol, tut, util

- new-style:
  foamApps, foamLib, foamRun, foamSol, foamTut, foamUtils

- additional aliases:
  userApps, whichFoam

NB: ideally we'd have 'foamSrc' instead of 'src'.
    Do we really need 'foamsrc' and 'foamfv' anyhow?

- compile into linux64Gcc44, linuxGcc44 to avoid clashes during testing
- continue to use gmp-4.2.4 since gmp-4.3.x might be miscompiled with
  a system gcc-4.3.2

- useful location for sharing in-house solvers, libraries, etc
  for use at the entire site

- similar naming convention as ~OpenFOAM expansion:

  FOAM_SITE_APPBIN=
  $WM_PROJECT_INST_DIR/site/$WM_PROJECT_VERSION/bin/$WM_OPTIONS

  FOAM_SITE_LIBBIN=
  $WM_PROJECT_INST_DIR/site/$WM_PROJECT_VERSION/lib/$WM_OPTIONS

- change name of environment variable from $WM_OS -> $WM_OSTYPE
  as a better description

- get version from $ParaView_VERSION or from -version option
- added QT gui support (useful when compiling enGrid)
- update files for finding cmake-2.6.4 as well
- added bin/engridFoam for calling a version of enGrid that uses the
  paraview libraries compiled with/for OpenFOAM
- added foam3rdParty change directory alias