Doc change: cleanup filtering sidebars and api level table. Changes links pointing to billing and other play docs that have moved.

Change-Id: I5528e82a6f97eb25f2ec2db5dfe1e178d9580f3c
diff --git a/docs/html/develop/index.jd b/docs/html/develop/index.jd
index 99bee67..86c04a7 100644
--- a/docs/html/develop/index.jd
+++ b/docs/html/develop/index.jd
@@ -52,7 +52,7 @@
                    <h2>In-app Subscriptions with Trials</h2>
                    <p>You can now set up a <strong>free trial period</strong> for any Google Play in-app subscription, making it easy for users try your subscriber content before automatically converting to a full subscription. Free trials give you a new way to bring users into your products and engage them effectively. </p>
                    <p><a class="button"
-href="{@docRoot}guide/google/play/billing/billing_subscriptions.html#trials">Read
+href="{@docRoot}google/play/billing/billing_subscriptions.html#trials">Read
 more</a></p>
                    </div>                
                 </li>