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
修复响应为空字符串的test case
Fix kfAcount test case
Merge pull request #97 from node-webot/upgrade

Upgrade
Update document
新增修改备注名的API
Merge branch 'TooBug-master'