Update `manual' functionality:
    
        - Start using cli_printActionPreamble.
    
        - Start using FLAG_TO, FLAG_QUIET and FLAG_YES flags.
        
        - Update command-line arguments interpretation.
    
        - Rename `--update-output' to `--update'.
    
        - Remove action value (ACTIONVAL) variable verification from
          manaul_getActions. Such verification is already on
          cli_checkRepoDirSource.
    
        - Modify manual_getEntry to take entry value from first positional
          parameter first, and later (if first positional paramenter is
          empty) use action value (ACTIONVAL) variable instead. This make
          manual_getEntry reusable.