New Features: - YAWL

As of Beta 5
In Response to BUG report by Andrew Hastie: Fixed propagation of task cancellation
so that events are sent to custom YAWL services. This was a functionality bug and
required considerable number of problem layers to be resolved.
Bug fixed. When running a beta 4 process with empty tasks, system threw a runtime
exception once trying to run the task. This was fixed by adding some guards to data
processing code to check for the presence of a task decomposition.
Bug fixed. When attempting to check in a work item from a yawl service, if the item
is cancelled then the worklist throws a runtime exception. This was fixed by caching
all active work items in the custom yawl service and letting the engine catch and
report the discrepancy.
Fixed decompositionID of beta 4 XML Schema so that it is now constrained by
NCName, previously a string.
As of Beta 4
After unloading a specification the 'Workflow Specifications' page used to hide the
specification even if there were still active, incomplete cases. Now the unloading of a
specification will still allow existing cases to complete undisturbed.
Active tasks of running cases are now cleaned up when the case gets cancelled.
Bug Fix: Connect method of Interface A now operational.
Bug Fix: Engine state is fully aligned with the work items announced to users.