org.hl7.fhir.core/RELEASE_NOTES.md

Validator:

• Better validation of bad references (and fix NPE)
• Rework output to be more informative and cleaner
• Fix bugs in validation of nested bundles
• Fix bug loading package with no specified version
• fix bugs loading discovered packages on the fly
• Validator now supports logical models in XML wkith no namespaces

Other code changes:

• Add version conversion for AllergyIntolerance (1.2 <-> 3.0 & 1.2 <-> 4.0)
• Add version conversion for MedicationRequest
• Fix rendering of documents
• fix for not rendering null values in patterns for must-support view