maintenance release, go 1.16 changes

need a cleaner version id, again

smoother build process

readline integration bug fixed

new line editor chzyer/readline

it's time for a new version tag

assorted minor changes

need another tag now-ish

let's clean up the version description a bit

have a newer tag than the one from Bermude

emergency tag as the real one hadn't been pushed, apparently

need another one

need a tag for git describe

version of the published benchmark from 2016-04-26