优化工单模块，增加企微模块

sg_wechat_enterprise/models/client/__init__.py

@@ -0,0 +1,11 @@
+from wechatpy.enterprise import WeChatClient
+
+from . import api
+
+
+class JkmWeChatClient(WeChatClient):
+    def __init__(self, corp_id, secret, session=None):
+        super(JkmWeChatClient, self).__init__(corp_id, secret, session=session)
+
+    oauth = api.JkmWechatOauth()
+    user = api.JkmWechatUser()