by Paul E. Robinson Whatever else he may be as a man and a musician, Kent Nagano is insatiably curious. So far, his Montreal audiences have not only accepted, but embraced, his voyages of discovery.This week Maestro Nagano and the Orchestre symphonique de Montréal (OSM) gave Place des Arts concert-goers a feast of the familiar and the unfamiliar that was truly exceptional, and I think they liked it.The evening’s star attraction was the outstanding violinist Anne-Sophie Mutter, now a fully mature artist after years of wonder as a young prodigy encouraged by the likes of Herbert von Karajan, Andre Previn…