ndb: make note equatble (William Casarin)

ndb: rename NostrEvent to NostrEventOld (William Casarin)

ndb: switch to computed property for tags (William Casarin)

ndb: implement a few more event things (William Casarin)

test: remove unused var (William Casarin)

notes: generalize event_is_reply a bit (William Casarin)

ndb: avoid double constructor on References (William Casarin)

pushed to refs/heads/master

http://git.jb55.com/damus/commit/2053033b257593519237fe3734e401a2cae58a59.html