starting with stage3, server datastructures modified, new client commands added- implementation following
grouBid communication
groupBid: user input block, poll rejection. poll timeout = 30 sec
groupBid: *confirmation + rejection works, client gets blocked on confirmation till timeout on client side or poll timeout serverside or group conirmation, * fair groupBid creation coming  soon
groupBid: introducing fairness policy to prevent starvation
minor bug fixes
multi-catch exception handling downgraded to match submission constraints
working hmac validation
auction database fixes
stage 2 complete... testing incomplete
merge