Upgrade urllib
add template message
Bump 0.8.10
更新申请token的内容
允许不传callback参数
Merge pull request #105 from zhudan/master

允许不传callback参数
add new custom service interface
Merge pull request #108 from ifeiteng/master

add new custom service interface
修复响应视频消息的模板，增加指定客服人员转发多客服消息
添加转发至多客服的测试代码
Merge branch 'zhongao-master'
Refine code
Update readme document
Bump 0.8.11
add getLasestToken