add Jazzy docs

docs/js/jazzy.js

@@ -0,0 +1,43 @@
+window.jazzy = {'docset': false}
+if (typeof window.dash != 'undefined') {
+  document.documentElement.className += ' dash'
+  window.jazzy.docset = true
+}
+if (navigator.userAgent.match(/xcode/i)) {
+  document.documentElement.className += ' xcode'
+  window.jazzy.docset = true
+}
+
+// On doc load, toggle the URL hash discussion if present
+$(document).ready(function() {
+  if (!window.jazzy.docset) {
+    var linkToHash = $('a[href="' + window.location.hash +'"]');
+    linkToHash.trigger("click");
+  }
+});
+
+// On token click, toggle its discussion and animate token.marginLeft
+$(".token").click(function(event) {
+  if (window.jazzy.docset) {
+    return;
+  }
+  var link = $(this);
+  var animationDuration = 300;
+  $content = link.parent().parent().next();
+  $content.slideToggle(animationDuration);
+
+  // Keeps the document from jumping to the hash.
+  var href = $(this).attr('href');
+  if (history.pushState) {
+    history.pushState({}, '', href);
+  } else {
+    location.hash = href;
+  }
+  event.preventDefault();
+});
+
+// Dumb down quotes within code blocks that delimit strings instead of quotations
+// https://github.com/realm/jazzy/issues/714
+$("code q").replaceWith(function () {
+  return ["\"", $(this).contents(), "\""];
+});