Post Fix-Review Changes: Develop -> Master

[Oighty]

Contracts with logic changes:

• AuctionHouse
• BatchAuctionHouse
• Auction
• BatchAuctionModule
• EMP

Changes made to contract logic:

• Support for Condensers added to AuctionHouse, which allow combining the extra auctionOutput with seller provided parameters to determine derivative inputs.
• Allow iterative settlement of batch auctions to avoid out of gas issues
• Change minBidSize to be an amount of quote tokens, instead of a percent of capacity (which is in base tokens).
• Combined settle and claimProceeds functions on batch auctions to avoid situations where users receive tokens before the seller gets their proceeds (and can do something with them via the callback). Downstream change is that onClaimProceeds callbacks are now onSettle callbacks.
• Added an open abort function that can be called after a batch auction concludes and its dedicated settle period has ended if the auction has not been settled. The purpose of this is for anyone to be able to abort an auction that cannot be settled so that the seller and bidders all receive refunds.

Known risks (which we are ok with)

• settle can be blocked by a blacklisted seller / callback contract on the quote token or a reverting callback.
• A valid auction can be aborted after the dedicatedSettlePeriod has passed.
• The number of winning bids is unbounded as long as they meet the minBidSize. In practice, this isn't likely to happen unless minPrice and minBidSize are set poorly.

[Oighty]

Review also included PR 181, which included changes to allow bidding / purchasing "on behalf of" another address. This enables various integrations, such as "zaps" or other smart contracts that perform logic before the call.

[10xhash]

Reviewed #174 and #181 Except a rounding issue (fixed by #182), everything looks good to me