Tolerate and fix various EPML errors during import.
Support for EPML Data Objects and Relations.
Changed C-BPMN gateway variants.
Support for reset nets in PNML.
- Conversion from BPMN tasks with interrupting events to reset nets in PNML.
- Tasks can now be converted to simple transitions or to start transition - place - end transition in PNML.
- Bug fixes to the database for persisting PNMLs.