I'm looking for a short story! I don't remember who it's by, but I think the title was 'Edge of eternity' or something similar. It's about a ship, powered by bussard ramjets, who's brakes basically do just that. The ship, unable to stop accelerating, keeps moving forward, faster and faster, time dilation growing so great that millions of years skip past every second. The crew of the ship stay alive, manage to survive the collapse and re-inflation of the universe, and settle on an earthlike planet to rebuild humanity. Help, please?