- 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