>> This week’s big event is, of course, the 15th Annual Capital Jazz Fest at Merriweather Post Pavilion, which begins today and runs through Sunday. As is the norm for this event, the lineup is heavy on the smooth jazz and R&B tip, but it also incorporates some more challenging artists. Highlights include Herbie Hancock, Anita Baker, Al Jarreau, Ramsey Lewis, and David Sanborn. Visit the event’s web site for the full schedule, and tickets…