- avoid mkdir except for a few directories
  - grouped settings and added comments
  - minor bugfix: $FOAM_INST_DIR/linux64/bin was in path (pre OpenFOAM-1.5)
  - local (non-exported) variables in lowercase

  - A simple container for objects of type \<T\> that can be used for
    transferring the contents rather than copying them.
  - The wrapped object of type \<T\> must implement a transfer() method.

  - let _foamAddPath and _foamAddLib handle ':'-separated variables
    This unfortunately gets the order backwards, but at least doesn't
    try making really stupid directory names

  TODO:
  - settings.csh still has the same bug
  - perhaps _foamAddExistingLib function (or with a switch) to avoid the mkdir

  - handle long format (GRID*), even when fields are not separated by spaces
  - added support for Hypermesh "$HMNAME COMP" extension

  - move tutorial cleanup to the end in case the user wishes to
    abort the wcleanAll script

  - adjusted wcleanAlmostAll according, but don't know if it's really
    needed any more