Herbert Muschamp writes that LA’s new Disney Hall is more than a building. “It’s a home for everyone who’s ever felt like a French curve in a T square world. Disney Hall is a riotous rebirth. Not just for downtown Los Angeles, where the building is situated, and not just for the whole sprawling mixed-up La-La. What is being reborn is the idea of the urban center as a democratic institution: a place where voices can be heard.”