Improve .mayoral-box UI

This commit does multiple atomic things. You know, like many of the best
commits from engineers who are too lazy to properly split up chunks of
work.

* Moves JS to bottom of <body>
* Removes assets/js/main.js, which didn't appear to be doing anything
* Removes database config comments in favor of the .env file to use with
  foreman
* The thing the commit title says (makes the whole mayoral-box
  clickable, and have some stats below each of them)