“Judas was a dick, but he deserved better.” It’s one theory anyway, and is sort of the point of The Last Days of Judas Iscariot, the intriguing new work being staged by the gutsy Forum Theater and Dance at H Street Playhouse. The play is set in purgatory, where a prosecutor on a mission (Julie Garner) has decided to try to get Judas Iscariot’s (Jason McCool) crimes against God re-tried, so he can escape from…