solves keepalive problem by session
add changelog following controller convention
Merge pull request #27 from hupili/simsimi

Simsimi using requests.Session
Merge pull request #26 from hupili/master

计算鸡 plugin
启用新插件--计算
如果精确值太长则转换成不精确的小数
TokenError
描述变动
增加几个万能回复
fix ut case