+ fixed #13 and #14
+ added resolveDataType for LiteralValueUse
+ added unassignedMember to CollectionDataInstance
+ changed super-class of Assignment to AtomicBehaviour (and added getParticipatingComponents implementation)
+ added DataUse.isEffectivelyStatic operation
+ changed StructuredDataType.extension to 0..* (multiple extensions)
+ changed SimpleDataType.extension to 0..* (multiple extensions)

+ extension for simple data types
+ data element use proposal

and text for ttcn-3 resources)

  + handle new default unassignedMemberTreatment
  + handle message keyword as identifier
  + handle action references without assigned component instance