Asynchronous switch functions (Make sure the DOM is parsed after switching) (#79)

* Make sure the DOM is parsed after switching

* Fix reload-link in the example

example/example.js

@@ -19,7 +19,8 @@ document.addEventListener("pjax:success", function() {
 
 document.addEventListener("DOMContentLoaded", function() {
   var pjax = new Pjax({
-    selectors: [".body"],
+    elements: [".js-Pjax"],
+    selectors: [".body"]
     // currentUrlFullReload: true,
   })
   console.log("Pjax initialized.", pjax)