attach data to pjaxified links so they can't be pjaxified twice. add simple refresh method

lib/proto/attach-link.js

@@ -56,6 +56,8 @@ var linkAction = function(el, event) {
 module.exports = function(el) {
   var that = this
 
+  el.setAttribute("data-pjax-enabled", "true");
+
   on(el, "click", function(event) {
     linkAction.call(that, el, event)
   })

lib/proto/parse-element.js

@@ -1,7 +1,10 @@
 module.exports = function(el) {
   switch (el.tagName.toLowerCase()) {
   case "a":
-    this.attachLink(el)
+    // only attach link if el does not already have link attached
+    if (!el.getAttribute("data-pjax-enabled")) {
+      this.attachLink(el)
+    }
     break
 
   case "form":

lib/proto/refresh.js

@@ -0,0 +1,6 @@
+
+var parseDom = require("./parse-dom")
+
+module.exports = function(el) {
+  parseDom(document);
+}