chess: Added a stock chess app.
ssb: Message display improvements: Fixed some dropdown menu issues, improved "about" message display, group more message types, and fixed mentions during compose.
ssb: Runs a new one-time automatic validation of stored feeds to clean up a previously fixed source of corruption.
ssb: Prevent publishing empty messages.
android: Fix DNS-based discovery.
docker: Docker build is now available on dev.tildefriends.net.
update: CodeMirror, picohttpparser.
