'Add common arguments for scraping MDN.'

def add_arguments(self, parser):

    parser.add_argument('url', metavar='URL_OR_PATH', nargs='?', default='https://developer.mozilla.org/en-US/', help='URL    or    path    to    a    wiki    page')
    parser.add_argument('--revisions', dest='revisions', metavar='REVS', type=int, default=1, help='Depth    in    revision    history    to    scrape')
    parser.add_argument('--translations', help='Include    translations', action='store_true', dest='translations')
    parser.add_argument('--depth', dest='depth', metavar='DEPTH', type=self.int_all_type, default=0, help='Depth    in    the    topic    tree    to    scrape    ("all"    for    all)')
