Daily Show scribe Tim Carvell dreams up a hilarious memo from the NFL to Paul McCartney...We've reviewed your set list and dance routine, and we have just a few notes: "Ob-la-di, Ob-la-da": Is there something you can say after "life goes on" that's not "bra"? The word still makes us a little nervous around here. Thanks. "Blackbird": "Take these broken ...