git-svn-id: svn+ssh://src.earth.threerings.net/narya/trunk@4602 542714f4-19e9-0310-aa3c-eee0fc999fb1
had the capability to add targets (with their own module / log-level). Add back in this capability, in very simple form for now. git-svn-id: svn+ssh://src.earth.threerings.net/narya/trunk@4584 542714f4-19e9-0310-aa3c-eee0fc999fb1