- more filtering in the sed stage to remove non-essential text.
  Terminate parsing on first appearance of -help-full option.

- With argList::noFunctionObjects() we use the logic added in
  4b933332 (issue #352)

  By removing the '-noFunctionObjects' option, we automatically
  suppress the creation of function-objects via Time (with argList
  as a parameter).
  There is generally no need in these cases for an additional

      runTime.functionObjects().off()  statement

  Use the argList::noFunctionObjects() for more direct configuration
  and reduce unnecessary clutter in the -help information.

  In previous versions, the -noFunctionObjects would have been redundant
  anyhow, so we can also just ignore it now instead.

- include bash completion for paraFoam, and provision for using
  foamEtcFile as well.

- 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.

- this reduces the number of functions and allows lazy loading of
  completion options, which makes it easy to quickly add any other
  OpenFOAM application in completion.

  The generic '_of_complete_' function handles (bash) completion for
  any OpenFOAM application. On the first call for any particular
  application, it retrieves the available options from the application
  help output and adds this information to its environmental cache for
  subsequent use.

- Tcsh completion uses the same function via a bash wrapper.
  But since its wrapper is transient, the on-the-fly generation would
  be less efficient. For this case, a pre-generated completion_cache
  can be used, which is generated with

      bin/tools/foamCreateCompletionCache