Now, New Yorkers who know the film (and who love it, hate it or partly love it and partly hate it) have a chance to see a streamlined (at 95 minutes) musical-theatrical spoof of the film, called "Love Actually? The Unauthorized Musical Parody." It's a lively, silly and well-performed romp created by people who seem to have done a lot of this sort of thing: writers Bob and Tobly McSmith ("The Office! A Musical Parody"…