almost finish fillmoney and refund,only some details to complete
找到一些小bug，並且修復，但是測試仍然十分不充分，晚些時候和李言路討論後決定刪除功能的去留
fix some bugs,ready for tomorrow
Merge pull request #33 from rw1993/master

almost finish fillmoney and refund,only some details to complete