Merge pull request #72 from lixinio/fix/wxwork

企业微信相关接口补充

Merge pull request #71 from lixinio/fix/wxopen

增加接口

Merge pull request #70 from lixinio/fix/event

补充比较频繁触发的event, 未知消息不返回nil

Merge pull request #69 from lixinio/fix/wxopen

修复webview接口不对的bug

Merge pull request #68 from lixinio/fix/wxopen

wxopen 回调, 补齐wxopen的一些函数

Merge pull request #66 from lixinio/fix/context

增加context支持

Merge pull request #65 from lwbio/main

增加企微客户群相关接口；

Merge pull request #62 from Albelt/feature/match_external_users

fix:企微-获取客户详情接口返回结构体问题

Merge pull request #63 from lixinio/fix/fields-tmpl

类目模板消息

Merge pull request #61 from pouringrain0628/feature/userid_to_open_us…

…erid

增加明文userid转换为密文open_userid接口