This adds the authors to the Zulip repository on GitHub from
/authors/ along with re-styling the page to fit the same
aesthetic as /for/open-source/ and other product-pages.
This helps make the Zulip development environment somewhat more robust
to new contributors, since it will give them a nice warning if they
try running any of our development tools outside the Zulip virtualenv.
Fixes#3468.
Contributor visualization showing the avatar, user name and number
of commits for each contributors. The JSON data would be updated
upon deployment, triggered by the `update-prod-static` script.
Brock Whittaker
sinwar
Tim Abbott
Tommy Ip