Rename Channel to Bidder, Move listener to Broker
added a test for Table ui
Add bidder id to the table when join
add Thread.sleep in twoBidderRacesWithSamePrice() to keep  the order of calling bid()
add test for custom cell
Remove Bidder, BidderObserver
Merge branch 'master' of github.com:agiledevteam/AuctionHouse
added bidder list table
merged Bidder List Table