Django now requires that commands have an explicit 'add_arguments' method.

The command "builddelete.py" is affected and needs updating.

Proposed fix:
    def add_arguments(self, parser):
        parser.add_argument('buildids', metavar='N', type=int, nargs='+',
                    help="Build ID's to delete")

... and ...

    def handle(self, *args, **options):
        for bid in options['buildids']: