ndb: add threaded ingester and writer queues (William Casarin)
queue: add pop_all (William Casarin)
util: add util helpers (William Casarin)
dir: add test database dir (William Casarin)
pushed to nostrdb:refs/heads/master
http://git.jb55.com/nostrdb/commit/3fff947f57174e2e581b1f53718c5518c6066311.html