ndb: lmdb init (William Casarin)

make: update in preparation for lmdb tests (William Casarin)

direnv: nix off for now (William Casarin)

direnv: todo.sh optional (William Casarin)

ndb: add ndb_init and ndb_process_event placeholders (William Casarin)

lmdb: add db scan helper (William Casarin)

make: add lmdb to build (William Casarin)

some todo helpers (William Casarin)

pushed to nostrdb:refs/heads/master

http://git.jb55.com/nostrdb/commit/e851c12abfed3a2387e95713654445206a19a0dc.html