Update Twitter and Facebook share buttons

theme/footer.php

@@ -5,4 +5,29 @@ if ($deploy_timestamp) {
   $js_url .= '?t=' . $deploy_timestamp;
 }
 ?>
+<div id="fb-root"></div>
 <script type="text/javascript" src="<?php echo $js_url ?>"></script>
+<script type="text/javascript">
+(function(d, s, id) {
+  var js, fjs = d.getElementsByTagName(s)[0];
+  if (d.getElementById(id)) return;
+  js = d.createElement(s); js.id = id;
+  js.src = 'https://connect.facebook.net/en_GB/sdk.js#xfbml=1&version=v3.2';
+  fjs.parentNode.insertBefore(js, fjs);
+}(document, 'script', 'facebook-jssdk'));
+</script>
+<script type="text/javascript">
+window.twttr = (function(d, s, id) {
+  var js, fjs = d.getElementsByTagName(s)[0],
+    t = window.twttr || {};
+  if (d.getElementById(id)) return t;
+  js = d.createElement(s);
+  js.id = id;
+  js.src = "https://platform.twitter.com/widgets.js";
+  fjs.parentNode.insertBefore(js, fjs);
+  t._e = [];
+  t.ready = function(f) {
+    t._e.push(f);
+  };
+  return t;
+}(document, "script", "twitter-wjs"));</script>