boundary cases and deal with users and games going away.
git-svn-id: svn+ssh://src.earth.threerings.net/narya/trunk@530 542714f4-19e9-0310-aa3c-eee0fc999fb1
across parlor.client, parlor.server and parlor.data.
git-svn-id: svn+ssh://src.earth.threerings.net/narya/trunk@437 542714f4-19e9-0310-aa3c-eee0fc999fb1
to take place for testing. Will flesh all the rest out later.
git-svn-id: svn+ssh://src.earth.threerings.net/narya/trunk@426 542714f4-19e9-0310-aa3c-eee0fc999fb1