GLOBAL MARKETS-European stocks set for biggest weekly gain of 2014

* Asia shares buoyed as Wall St surges for second day* BOJ sticks with bond buying, ECB creeping closer to QE* Risk appetite begins to re-emergeBy Marc JonesLONDON, Dec 19 (Reuters) - World markets are ending their last full week of 2014 on a high, as Wall Street made its biggest two-day advance since late 2011 and European shares headed for their strongest week of the year.The gains came amid rel