Fix issue #14 (click reload).

src/pjax.js

@@ -27,6 +27,7 @@
       this.options.switches = this.options.switches || {}
       this.options.switchesOptions = this.options.switchesOptions || {}
       this.options.history = this.options.history || true
+      this.options.clickReload = this.options.clickReload || false
       this.options.analytics = this.options.analytics || function(options) {
         // options.backward or options.foward can be true or undefined
         // by default, we do track back/foward hit
@@ -271,10 +272,13 @@
 
         event.preventDefault()
 
-        // don’t do "nothing" if user try to reload the page
-        if (el.href === window.location.href) {
-          window.location.reload()
-          return -6
+        // If options.clickReload is true, when a user click twice on a link,
+        // try to reload the page. Otherwise, do nothing.
+        if (this.options.clickReload) {
+          if (el.href === window.location.href) {
+            window.location.reload()
+            return -6
+          }
         }
 
         this.loadUrl(el.href, Pjax.clone(this.options))