merged/implemented cdm3.3 model adaptations
SourceCollectionDetailSection : updated construction of DervivedUnit using SpecimenOrObservationType SpecimenCollectionDetailSection : updated construction of DervivedUnit using SpecimenOrObservationType GeneralDetailElement : added combo box to choose from known SpecimenOrObservationTypes...
refactoring of package names for consistency
had to rename the packages to make them compliant with buckminster