Shows growl notification message via `growlnotify` command.

        `title`
            Notification title.
        `message`
            Notification message.

def _growlnotify(title, message):
    """ Shows growl notification message via `growlnotify` command.

        `title`
            Notification title.
        `message`
            Notification message.
        """

    try:
        paths = common.extract_app_paths(['growlnotify'])
    except ValueError:
        return

    common.shell_process([paths[0], '-t', title, '-m', message])