GCAttribute validation logic
comments
GCMutableNode: GCNode implements description
GCNode rewrite step 1: GCNodeParser w/ delegate callbacks
Comparison methods
tags.py, GCChangedInfoAttribute: cleanup, describedObject
DateHelpers: cleanup
GCValue: gather headers
header imports cleanup
tags.py / Generated: split files
removed GCMutableNode; added GCNodeParser
moved initWithGedcom to external files
refactor reverseRelationship logic
GCObject: reworked properties+KVC
Attribute/Relationship cleanup
GCContext _entityForXref
changeinfo cleanup
GCContext: Use NSMapTables internally; drop callbacks
GCProperty todo
GCContext: use queue/group for dispatch