Generates a new model name, given the model number.

def generate(model_num):
    """Generates a new model name, given the model number."""
    if model_num == 0:
        new_name = 'bootstrap'
    else:
        new_name = random.choice(NAMES)
    full_name = "%06d-%s" % (model_num, new_name)
    return full_name