doc: reformat authors section

Make the order of name, email and other additions simpler to
copy paste and/or match with git commit messages.

Useful when working with `Reviewed-By`.

PR-URL: https://github.com/nodejs/io.js/pull/1966


Reviewed-By: Christian Tellnes <christian@tellnes.no>
Reviewed-By: Ben Noordhuis <info@bnoordhuis.nl>