暂时删除调用get_big_contact方法，用新的分批获取联系人的方式，获取超过2000联系人的列表

wxbot.py

@@ -710,7 +710,7 @@ class WXBot:
                     with open(os.path.join(self.temp_pwd,'wxid.txt'), 'w') as f:
                         f.write(json.dumps(self.wxid_list))
                     print "[INFO] Contact list is too big. Now start to fetch member list ."
-                    self.get_big_contact()
+                    #self.get_big_contact()
 
             elif msg['MsgType'] == 37:  # friend request
                 msg_type_id = 37