New Age music has found a real maverick in David Lanz. The Seattle pianist grew up loving classical rock bands like Procol Harum, the Moody Blues and Emerson Lake & Palmer. He quickly learned the value of songwriting craft -- and has since brought those lessons to the New Age genre, where he reigns as an unpredictable but bona fide star. "When I looked at the early days of New Age, I liked the intent, but no one was writing any hooks or putting any melody to it," says Lanz, who plays two shows at the Berklee Performance Center tomorrow night. "I felt it was never going to evolve past the point...