The ‘Young Folks’ hitmakers’ latest album aims to capture their ‘punky and energetic’ live sound. By James Montgomery Peter Bjorn and John Photo: V2 Music Scandinavia On Tuesday, Swedish hookmeisters Peter Bjorn and John return to stores with Gimme Some, their sixth full-length and their third since they became internationally famous (and poster children for whistlers everywhere) with their hit “Young Folks.” Of course, given the rather stiff competition PB&J face here in the states — Gimme Some has the relative misfortune of being released against both Britney Spears’ Femme Fatale and Wiz Khalifa’s Rolling Papers — the guys aren’t optimistic about their album’s chart-topping chances. “Our chances are probably not so good. I don’t know,” Peter Mor