package.json: update name and repo
Update README.md

closes #6
derive avatar url from email

close #11
fix `maintainer` for compressible and mime-types

re-play commit https://github.com/jshttp/jshttp.github.io/commit/1f8c4924a37040859ab455eec52a6c3c7affe83e
Merge https://github.com/repo-utils/badgeboard
rebuild

I fixed maintainer info in config.yaml, so don't worry about
mismatch here - it's now displayed on the website correctly.