Some movies are too good to miss. "Judy Berlin" is one of them. I first saw writer-director Eric Mendelsohn's funny, touching and vital debut feature a year ago at the Sundance Film Festival. Audiences cheered; Mendelsohn, 35, won the Best Director award; great things were predicted. Then nothing - until now. Thanks to a deal between Loews Cineplex Entertainment and the Shooting Gallery, a gutsy young company run by Larry Meistrich, "Judy Berlin" leads off a series that will bring indie films to