Connect to weixin

Signed-off-by: Takashiro <takashiro@qq.com>
Fix login bugs

Signed-off-by: Takashiro <takashiro@qq.com>
Add new command Help to Weixin Server

Signed-off-by: Takashiro <takashiro@qq.com>
Allow users to mark orders as delivered

Signed-off-by: Takashiro <takashiro@qq.com>
Fix a bug caused by deleted products

Signed-off-by: Takashiro <takashiro@qq.com>
Update database structure

Signed-off-by: Takashiro <takashiro@qq.com>