GLOBAL MARKETS-Shares, bonds lifted by QE; oil up after Saudi king dies

* European shares have best week since 2011 on ECB QE, * Euro slumps to 11-year low, bond yields reach new lows * Crude oil rises after death of Saudi King * Weekend Greek elections next trial for struggling euro By Marc Jones LONDON, Jan 23 (Reuters) - Stocks and bonds surged worldwide and the euro sank to an 11- year-low on Friday, the day after the European Central Bank announced a quantitative easing plan. Oil rose following the death of the king of Saudi Arabia. Eur