Merge pull request #1044 from Polymer/build-for-production

Add Build for production doc.

Author: Arthur Evans

docs/_data/guide.yml

@@ -39,6 +39,9 @@ toc:
   use: 
     title: Use a component
     url: /guide/use
+  build: 
+    title: Build for production
+    url: /guide/build
   resources:
     title: Resources
     header: true