Merged in feature/from-pantheon (pull request #16)

code from pantheon

* code from pantheon

wp/wp-content/plugins/wp-native-php-sessions/assets/js/notices.js

@@ -0,0 +1,11 @@
+jQuery(document).ready(function($) {
+  $(document).on('click', '.notice-dismiss', function() {
+      $.ajax({
+          url: ajaxurl,
+          type: 'POST',
+          data: {
+              action: 'dismiss_notice'
+          }
+      });
+  });
+});