GLOBAL MARKETS-Dollar hits six-year peak versus yen, ECB aims cash hose

* Dollar sweeps higher on diverging outlook for global rates * Japanese stocks at highest since 2008 as yen skids * Gold, oil prices pressured by rising dollar * Scottish independence vote looms, unionists just ahead * ECB set to turn liquidity taps back on to full By Marc Jones LONDON, Sept 18 (Reuters) - The dollar vaulted to a six-year peak against the yen on Friday as the Federal Reserve's outlook for rising interest rates underlined the diverging path between the Un