PHILLIP ROEBUCK At the start of the 20th century, Sears, Roebuck and Company would ship you a house. It came in a boxcar - all you had to do was put it together. And there it was, a self-contained unit, wherever you wanted it to go. As a banjo-strumming solo roots-punk artist with a bass drum strapped to his back, Phillip Roebuck is the classic Sears House. A self-contained unit, all he needs to play a show is space enough to stand. His music implies as much ramshackle rail-riding Americana as classic Wobbly rally anthems. As for the latter, he probably knows a few. With Jym Chapman and the Migrant Workers, The Joy Kills and Time Sawyer. $7-$9. The Milestone.