New Release of OpenCms Workflow2 module v0.4.0

- Added module initialization class to manifest
- Fixed task create date issue, reimplemented as engine responsibility (task instance)
- Fixed pooled user issue
- Improved Event Handling. Added utility class 'WorkflowEventGun' to fire workflow related events
- Extended logging

Now there is also a full (ready for installation) package which includes readme.txt, license, opencms-workplace.xml, the workflow2 opencms module and all dependencies.