This film has been generating a lot of buzz for a few reasons: 1.) it is one of the few modern day pieces that Kiera Knightley is in, 2.) it is a musical, 3.) it is directed by someone who won an Academy Award for Best Original Song and 4.) it is Adam Levine's film debut. That said, expectations were a little higher than usual. Here's my round-up of John Carney (Once)' entry to the Toronto International Film Festival, Begin Again. Please note that there may be spoilers. Read at your own risk. THE STORY: Dan (Mark Ruffalo - Now…