doc: add App Engine docs to 'learn' and 'reference' pages

R=golang-dev, dsymonds
CC=golang-dev
https://golang.org/cl/5672048
diff --git a/doc/docs.html b/doc/docs.html
index 169b7c1..907cdbd 100644
--- a/doc/docs.html
+++ b/doc/docs.html
@@ -51,6 +51,12 @@
 How to write a new package and how to test code.
 </p>
 
+<h3 id="appengine"><a href="http://code.google.com/appengine/docs/go/gettingstarted/">Getting Started with Go on App Engine</a></h3>
+<p>
+How to develop and deploy a simple Go project with
+<a href="http://code.google.com/appengine/">Google App Engine</a>.
+</p>
+
 <h3 id="go_faq"><a href="go_faq.html">Frequently Asked Questions (FAQ)</a></h3>
 <p>
 Answers to common questions about Go.