query: add tag index and tag queries (William Casarin)

filter: don't end field if we don't have one active (William Casarin)

cli/ndb: allow multiple kind values in query (William Casarin)

envrc: add PWD to path (William Casarin)

perf: add some flamegraph helpers to makefile (William Casarin)

fix macos build (William Casarin)

ndb: measure query performance (William Casarin)

pushed to nostrdb:refs/heads/master

http://git.jb55.com/nostrdb/commit/591499c2f63c3cbb260cfd73eed881a131571a91.html