- allows fixes before trying to push

- makes it easier to cut-and-paste from dictionary contents that use
  the Foam::findEtcFile expansion

- remove all corresponding logic from foamExec

- This lets foamExec use foamEtcFile as well, but debian packaging
  still needs some work

- avoids them showing on related pages

- improves flexibility and allows more consistent long options

Reverted to using additional variable.

- the path is accesible either way, but use setenv for consistency with
  other environment variables. It also simplifies foamCleanPath again.

For example, within the user ~/.OpenFOAM/<VER>/prefs.sh:

    foamPrefs=`$WM_PROJECT_DIR/bin/foamEtcFile -m go prefs.sh` \
        && _foamSource $foamPrefs

could be used to write a personal adjustment that also includes the
site-wide prefs.

present.

old: $WM_THIRD_PARTY_DIR/<packageName>/platforms/$WM_ARCH*
new: $WM_THIRD_PARTY_DIR/platforms/$WM_ARCH*/<packageName>

This streamlines the creation of binary packs, eases distribution and
helps when testing the robustness of relocatable installations.

BUG: engridFoam had $WM_ARCH instead of $WM_ARCH$WM_COMPILER

- this allows more direct use by c-shell

Create a new case from a template for particular applications

- Also adjusted formatting of usage to match what argList generates