Fixed list keys to be able to list more than 200 matching keys.

        if not args.end:

            args.end = args.start + '\xff'

        keys = self.client.getKeyRange(args.start, args.end)

        # getKeyRange will return a maximum of 200 keys. if we have that many

        # we need to continue retrieving keys until we get none or less than 200.

        if len(keys) == 200:

            last_key_retrieved = keys[len(keys)-1]

            retrieving_keys = True

            start_key_inclusive = False

            while retrieving_keys:

                partial_keys = self.client.getKeyRange(last_key_retrieved, args.end, start_key_inclusive)

                if len(partial_keys) > 0:

                    keys.extend(partial_keys)

                    if len(partial_keys) == 200:

                        last_key_retrieved = partial_keys[len(partial_keys)-1]

                    else:

                        retrieving_keys = False

                else:

                    retrieving_keys = False

        return keys

    @add_parser(list_parser)