Refactor and rename OrderList to ItemList
Refactor Trade#last_price
Trade#for_notify
Can be able to living update trades
Populate done orders
Add rake task for migration ask_member_id/bid_member_id
Add migration script for ask_member_id and bid_member_id
saving ask_member_id and bid_member_id when create trade
Fixed canceled order doesn't show up in history orders list