YouTube personality James Hobson has finally done what so many movie nerds before him have dreamed about: He created a functional — and potentially deadly — lightsaber fit for a real Jedi.Many a “Star Wars” fan have tried to create a genuine lightsaber, but have only succeeded in achieving the look through the use of non-retractable metal tubing and light — in other words, a glorified flashlight.However, the self-dubbed “Hacksmith” employed what no builder has yet — the principles of laser