Cellist Matt Haimovitz goes solo with CityMusic...by Michael Gill...Virtuoso cellist Matt Haimovitz has made a career of bringing classical music to people who don't hear it much. In the mid-'90s, having played as soloist with major orchestras in venues like Carnegie Hall, the Israeli-born, American-raised musician got frustrated with the narrowness of classical-music culture and the kind of career typically available to classical musicians. It especially bothered him to see almost no one his age — mid 20s at the time — in the concert halls. So he…