Issue #AR-1_serialization: fix regression error, added AsFieldsetAttribute to help resolve ambiguous complex models, some renaming
Issue #AR-1_serialization: removed hardcoded fieldsets[0].properties restriction
Issue #AR-1_serialization: clarify deserialization logic
Issue #AR-1_serialization: fix deserialization for complex models (i.e. models employing AsFiedlset hinting)