IMPORTANT NOTE: Version 0.3.0 introduced backward incompatibilities and a direct upgrade is not possible. Please backup data tables and reinstall extension. 
All constraints were given specific names so future updates can more easily be done using the extension system. 
update_step() parameters have changed.
close, fail and cancel functions can no longer take a custom config table. Was a nice idea but doesn't work as I'd hoped.
job_alert_nagios table changed to job_status_text.
job_detail elapsed_time column data type changed.