GLOBAL MARKETS-European stocks rally on ECB easing, Wall St sags and euro tumbles

* Wall St stung by soft corporate earnings * European shares have best week since 2011 on ECB QE, * Euro slumps towards $1.11 to 11-year low * Treasuries rally as European bond yields decline * Crude oil rises after death of Saudi King By Michael Connor NEW YORK, Jan 23 (Reuters) - The European Central Bank's plan to pump out about 1 trillion euros to revive the euro zone economy kept stocks in the region on track for their best week since 2011 but knocked the shared cur