0.3.1

bin/sweep.php ends every sign-in past its time and forgets old records from cron, so it no longer waits for somebody to open an Omeka page: pages outside Omeka that read the session table (a site's own staff pages) no longer take an expired sign-in for a working one on a quiet day. Run it every 5 minutes as the web server's user (see README). Silent unless it did something; exit 1 on an error. The web sweep is unchanged. Upgrade from 0.3.0: Modules, Active Sessions, Upgrade (no database change). See CHANGELOG.md.