Update `shell' functionality:
    
        - Start using 2009-2011 year range in copyright note.
    
        - Move command-line argument interpretation from
          shell_updateCopyright to shell_getActions.
    
        - Move regular expression re-definition from shell_updateCopyright
          to shell_getActions.sh. The regular expression definition (REGEX)
          in shell_getActions is valid for all actions that take place
          inside `shell' functionality. If a specific regular expression
          value is required for an specific action then, the regular
          expression needs to be redefined inside that specific action to
          overlap shell_getActions definition.