LONDON (AFP) – The G20 vowed Saturday to maintain emergency measures to fight the world economic crisis, warning it was not over yet, while tensions between Europe and the United States remained over bankers' bonuses. After a meeting in London preparing for a leaders' summit later this month, finance ministers said they agreed fresh measures to keep the world economy on the right track, a year after it teetered on the brink of collapse. But they warned there was no room for complacency. "We remain cautious about the outlook for growth and jobs," the ministers said in a communique. "We...