SAN FRANCISCO, Oct 25 - Minutes after the San Francisco Giants concluded their 8-3 rout of the Detroit Tigers in the opening game of the World Series, Austin Jackson began thinking about Round Two on Thursday. "It's been that way the whole season," the Tigers centerfielder told reporters after Wednesday's clubbing. "And now it's no different. It's not the time to hang your head on one game. "We still have to come out and play so you have to have a short memory and forget about it. ...