Five things: Harvard's free tuition, Brightcove layoffs, the Gardner heist, and it's bracket time

Good morning, Boston. Fun surprise for St. Patrick's Day patrons at The Dubliner pub in downtown Boston last night: Ed Sheeran showed up for a surprise performance. And early this morning, Here are the five things you need to know in local business news to start your Tuesday. Greg Ryan reports that Somerville’s planning board is considering a proposal to build an eight-story apartment building in Assembly Row. BBJ Chief Photographer Gary Higgins spent time at Bluebird Graphic Solutions in…