Implement the "Auction House" reward system

[GGonryun]

The auction house is a new rewards system that gives most players an equal chance of winning. The auction house plays out much like a penny-auction in which players pay 1~5 tokens to be the "leader" of the auction. Every time a new leader for an auction is set, the auction's timer increases by a 1 to 30 minutes. The amount of time that an auction increases by gets smaller as more and more people participate. When the auction ends, the leader of the auction is awarded the prize.