- this was not agreed.

This reverts commit 41b196ff.

This reverts commit 54a8b6a1.

 - names updated to reflect what they are based on, e.g. either k
   or U

- simplified the logic
- provide direct link to the respective scripts
- provide help from the respective scripts

- drop reference to license directory
- check -help before checking directories

- search for foamLog.db is more consistent with foamEtcFile
    $HOME/.OpenFOAM/$WM_PROJECT_VERSION
    $HOME/.OpenFOAM
    $WM_PROJECT_INST_DIR/site/$WM_PROJECT_VERSION
    $WM_PROJECT_INST_DIR/site
    $WM_PROJECT_DIR/etc
    $PROGDIR/tools

- 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?

- rhoCentralFoam

- could also move to utilities/miscellaneous

- the dictionary compare contents might be useful enough to move
  into dictionary code.

- usage example (w/o -rewrite):

      for i in $(find -name fvSolution)
      do
          fvSolutionCombine -case "${i%/system/fvSolution}"
      done

- this would be an argument for providing default values at the top-level
  compressible/incompressible turbulenceModel

- avoids raw values sprinkled about the code
  eg, 'defaultKappa_'  vs. '0.41'

- got hit by spacing error and it took too long to pinpoint the problem:

  #include "XXX"   <- okay
  # include "XXX"  <- wrong!

- 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

- partial revert for
  commit 9557f2cb