Aug 18 (Reuters) - Gold prices rose on Thursday, as the dollar and Treasury yields pulled back slightly after U.S. Federal Reserve minutes hinted policymakers may be less aggressive on future rate hikes. * Data released on Wednesday showed U.S. retail sales were unexpectedly unchanged in July as falling gasoline prices weighed on receipts at service stations, but consumer spending appeared to pick up at the start of the third quarter. * Britain's consumer price inflation rose to 10.1% in July, its highest since February 1982, official figures showed.