Announce: LimDB, a fast, persistent table with LMDB under the hood

[cumulonimbus]

It's been years since I've used LMDB, and it was amazing. Note that there's a 
fork called MDBX which claims to be much better (do not test myself, but heard 
from others that these claims are credible). It appears to have moved from 
github to here: 
<https://gitflic.ru/project/erthink/libmdbx#improvements-beyond-lmdb>