Update tcar_printHelp implementation.
    
    - Previously, you could pass an argument to --help option to read
      documentation about specific files. The initial idea doesn't look
      bad but I need to be pragmatic about the fact won't go to document
      everything file at this moment. I will create module documentation
      only and everything else will be put in comments, inside script
      files. This update changes the script and documentation files to
      remove the argument references passed to --help option. Just --help,
      without argument, will be supported by now.