Detroit Free Press: Ten million dollars amounts to loose change for most automakers, but the backers of the Automotive X Prize hope it’s enough to kick off a race for better vehicle technology. The foundation behind the X Prize unveiled title sponsor Progressive Insurance on Thursday and said it would begin testing vehicles in New York and other cities next year. The prize goes to the teams that can produce the most production-ready vehicles that get 100 miles per gallon or more and win a …