EntertainmentThe 64th Primetime Emmy Awards proved a great night for mature talent to shine. As double winner Louis C.K., 45, put it, when asked backstage why his show works now while past efforts failed, “because I’m better than I was before. … Older people are smarter and funnier.” In the case of Outstanding Lead Actress in a Comedy Julia Louis-Dreyfus, we’d have to say she has always been smart and funny — and continues to be at the top of …