GLOBAL MARKETS-Stocks roar Fed approval; dollar, bond yields wilt

* European bourses jump, bond yields tumble* Fed minutes show concerns about global economy, strong dollar* Dollar index slumps as U.S. rate hike expectations scaled back* Wall Street shares make biggest gains in 2014By Marc JonesLONDON, Oct 9 (Reuters) - World stock markets roared their approval on Thursday of reassurances the U.S. Federal Reserve will not rush into raising interest rates, with r