message: Add version query string to CSS to force browsers to load new CSS
diff: @@ -24,7 +24,7 @@ const Head = React.createClass({
  <link rel="alternate" type="application/rss+xml" href="/jest/blog/feed.xml" title="Jest Blog RSS Feed" />
  <link rel="shortcut icon" href="/jest/img/favicon.png" />
  <link rel="stylesheet" href="https://cdn.jsdelivr.net/docsearch.js/1/docsearch.min.css" />
  - <link rel="stylesheet" href="/jest/css/jest.css" />
  + <link rel="stylesheet" href="/jest/css/jest.css?v=2" />
  <link rel="stylesheet" href="//cdn.jsdelivr.net/font-hack/2.020/css/hack.min.css" />
  <script type="text/javascript" src="//use.typekit.net/vqa1hcx.js"></script>
  