Update Polymer from 1.2.1 -> 1.2.3

third_party/polymer/v1_0/components-chromium/iron-pages/README.md

-iron-pages
-==========
+
+<!---
 
+This README is automatically generated from the comments in these files:
+iron-pages.html
+
+Edit those files, and our readme bot will duplicate them over here!
+Edit this file, and the bot will squash your changes :)
+
+-->
+
+[![Build Status](https://travis-ci.org/PolymerElements/iron-pages.svg?branch=master)](https://travis-ci.org/PolymerElements/iron-pages)
+
+_[Demo and API Docs](https://elements.polymer-project.org/elements/iron-pages)_
+
+
+##&lt;iron-pages&gt;
+
+
 `iron-pages` is used to select one of its children to show. One use is to cycle through a list of
 children "pages".
 
 Example:
 
-```html
-<iron-pages selected="0">
-  <div>One</div>
-  <div>Two</div>
-  <div>Three</div>
-</iron-pages>
+    <iron-pages selected="0">
+      <div>One</div>
+      <div>Two</div>
+      <div>Three</div>
+    </iron-pages>
 
-<script>
-  document.addEventListener('click', function(e) {
-    var pages = document.querySelector('iron-pages');
-    pages.selectNext();
-  });
-</script>
-```
+    <script>
+      document.addEventListener('click', function(e) {
+        var pages = document.querySelector('iron-pages');
+        pages.selectNext();
+      });
+    </script>
+
+