- unknown options or missing option values now emit a shorter message
  without the entire usage. This makes it easier to identify the errors
  and is better aligned with the behaviour of GNU system tools.

  ====
     $ simpleFoam -case
     Using: OpenFOAM-plus (see www.OpenFOAM.com)
     Build: plus-01234

     Error: option '-case' requires an argument

     See 'simpleFoam -help' for usage
  ====

- provide for reduced (-help) and full (-help-full) usage information.
  In many cases the reduced usage provided sufficient and easier
  to find the information.

- make -srcDoc an alias for -doc-source

- no warnings about option aliases for future dates.

- new behaviour is to do nothing if no platform was specified.
  This helps avoid inadvertently removing files.

- support special platforms for compatibility with wmake/wclean targets.
  Eg, "wcleanPlatform all"

- allow use from ThirdParty top-level as well, since the directory
  structure is similar.

BUG: fix regression in wcleanLnIncludeAll introduced by 9e2e1115

- use -name test before -type test to avoid calling stat(2) on every file.
- use -delete instead of -exec rm to avoid forking

- also add some comments about the side-effects

Patch provided by Bruno Santos
Resolves patch request https://bugs.openfoam.org/view.php?id=2425

wclean: added support for automatic searching up the tree for the Make directory if in a sub-directory

The Makefiles are now in the makefiles sub-directory

The "-f | -force" option in wmakeLnInclude is now "-u | -update" for
consistency with the other scripts.

The "Usage" entry in the headers is now consistently formatted in all
scripts.

This reverts commit c5bea524.

This reverts commit 2e1e671d.

- more consistent script names
- remove '-help' option from internal scripts

  - send error messages to stderr
  - added -h/-help options where some were missing
  - changed 3-space to 4-space indentation
  - where possible, allow multiple directories from the command-line

  - fixed typo: had skipped '-Make' instead of 'Make' directory

  - remove broken links first
    * helps when file locations have changed

  - filter out trailing 'lnInclude' from the <dir> spec
    * this makes it easier to update existing lnInclude dirs:
         find -name lnInclude -exec wmakeLnInclude -f {} \;

  - reduced output noise when re-creating an identical link