Added support to new activities

The following activities are now supported:
- AddToCollection<>
- ClearCollection<>
- ExistsInCollection<>
- RemoveFromCollection<>
- Compensate
- Confirm
- Rethrow
- TerminateWorkflow
- CorrelationScope
- CancellationScope
- CompensableActivity
- TransactionScope
- NoPersistScope