更新成员加入条件

        :rtype: bool

def update_limit(self, days, kind=2, condition='>='):
        """更新成员加入条件

        :rtype: bool
        """
        url = 'http://www.shanbay.com/team/setqualification/%s' % self.team_id
        data = {
            'kind': kind,
            'condition': condition,
            'value': days,
            'team': self.team_id,
            'csrfmiddlewaretoken': self._request.cookies.get('csrftoken')
        }
        r = self.request(url, 'post', data=data)
        return r.url == 'http://www.shanbay.com/referral/invite/?kind=team'