By: Addison Wylie I liked Craig Johnson’s indie The Skeleton Twins, but it’s a stickler of a movie to justify.  It hardly has a narrative except when it peppers in a loose story towards the final leg, and it’s a character study that’s light on characterization.  To say it’s either one or the other doesn’t feel right.  Without the film’s stellar leading performances, The Skeleton Twins truly would be floating. Johnson has recruited Saturday Night…