San Francisco-based digital currency exchange Kraken has announced support for DAO (Decentralized Autonomous Organization) tokens, with seven fiat-based DAO trading pairs: DAO/XBT, DAO/ETH, DAO/EUR, DAO/USD, DAO/CAD, DAO/GBP and DAO/JPY.The launch of the new trading pairs, which is scheduled for May 28th, will come with all…