(Repeats story first published on Aug 5, text unchanged) By Svea Herbst-Bayliss and Nishant Kumar BOSTON/LONDON, Aug 5 (Reuters) - Big hedge funds that bet on currencies and interest rates had their best July in years, according to figures obtained by Reuters, while the performance of stock-picking hedge fund managers was mixed due to market gyrations. The returns put most prominent macro-focused hedge funds into the black for the year, after losses in April and June, but they sti