can write/read nodes with by-name concepts in binary persistence (required by stub concepts)
implement getStubConcept
stub concepts finally work (quite hacky though, need another way)
Quick fix to get interpreted concept descriptors working - lazy initialization of hierarchical attributes. Unless lazy, StructureAspectInterpreted.ensureInitialized() gets invoked numerous times for a single concept when walking its parent hierarchy (until ConceptRegistry#startLoad get it blocked with eventual InvalidConceptDescriptor for a parent). Absence of parent descriptor leads to incomplete set of property names and failures to work with model.