Merge pull request #48 from allanpk716/master

Update README.md
add oauth2 for web
bug fix
fix Issue #55 for getRev msgs
Merge branch 'payment'
fix return json
获取接收TICKET

获取接收TICKET
Merge pull request #56 from leeeboo/master

获取接收TICKET
添加 获取与指定用户的对话内容列表
增加客服消息接口，补充网页授权说明
Merge pull request #58 from neway3000/master

 获取与指定用户的对话内容
fix json print notice
fix getOauthUserinfo request URL