This reverts commit 2e1e671d.

- improves flexibility and allows more consistent long options

- Also adjusted formatting of usage to match what argList generates

- move url to lower right: makes version information stand out better

  - 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

    foamUpdateCaseFileHeader:
      - handle multiple files
      - use fixed version width
      - replace grep/tr/cut -> sed

    foamUpgradeTurbulenceProperties:
      - handle multiple files