Benedict Cumberbatch (left) with Sherlock co-star Amanda Abbington UPDATEDPASADENA, CA–Julia Roberts, Matthew McConaughey, Jimmy Fallon…stand aside. The biggest draw at this Winter’s Television Critics Association press tour was from PBS.No, not Grover or Cookie Monster, or even Ken Burns. The star who caused the biggest stir this January was Benedict Cumberbatch.Fans with autograph books, some