Doc change: Updates to preview program overview and tags.

Change-Id: I60db437ea5aabe3fad0284726d0e3850828c92a3
diff --git a/docs/html/preview/index.jd b/docs/html/preview/index.jd
index d9af7e0..c5644cc 100644
--- a/docs/html/preview/index.jd
+++ b/docs/html/preview/index.jd
@@ -8,28 +8,35 @@
 @jd:body
 
 <section class="dac-expand dac-hero dac-light" >
-  <div class="wrap" style="max-width:1100px">
+  <div class="wrap">
     <div class="cols dac-hero-content">
       <div class="col-9of16 col-push-7of16 dac-hero-figure">
-        <img class="dac-hero-image" src="/images/home/devices-hero_620px_2x.png">
+        <img class="dac-hero-image" src="{@docRoot}images/home/devices-hero_620px_2x.png"
+             srcset="{@docRoot}images/home/devices-hero_620px.png 1x,
+             {@docRoot}images/home/devices-hero_620px_2x.png 2x">
       </div>
-      <div class="col-6of16 col-pull-8of16">
+      <div class="col-7of16 col-pull-9of16">
         <h1 class="dac-hero-title">Android M Developer Preview</h1>
         <p class="dac-hero-description">
           Get ready for the next version of Android. Test your apps on Nexus 5, 6, 9, and
           Player. Explore what's new &mdash; a <strong>runtime permissions</strong> model,
-          power-saving <strong>Volta features</strong>, new <strong>assist technology</strong>,
-          and more.
+          power-saving <strong>Doze</strong> and <strong>Standby Mode</strong>, new
+          <strong>assist technology</strong>, and more.
         </p>
 
-        <a class="dac-hero-cta" href="/preview/overview.html">
+        <a class="dac-hero-cta" href="{@docRoot}preview/overview.html">
           <span class="dac-sprite dac-auto-chevron"></span>
           Get Started!
         </a><br>
       </div>
     </div>
-
-
+    <div class="dac-section dac-small">
+      <div class="resource-widget resource-flow-layout col-16"
+           data-query="collection:preview/landing/resources"
+           data-cardSizes="6x2"
+           data-maxResults="6"></div>
+    </div>
+  </div>
 </section>
 
 
@@ -40,30 +47,6 @@
 </div>
 
 <section class="dac-section dac-gray dac-small dac-invert" id="latest"><div class="wrap">
-  <h2 class="norule">Resources</h2>
-<div class="dac-section dac-small">
-      <div class="resource-widget resource-flow-layout col-16"
-           data-query="collection:preview/landing/resources"
-           data-cardSizes="6x2"
-           data-maxResults="6"></div>
-    </div> 
-  </div></section>
-
-
-
-<section class="dac-section dac-section-light" id="build-apps"><div class="wrap">
-  <h1 class="dac-section-title">Get your apps ready</h1>
-  <div class="dac-section-subtitle">
-    Resources to help you learn about Android M and get your app ready.
-  </div>
-  <div class="resource-widget resource-flow-layout col-16"
-       data-query="collection:preview/landing/resources"
-       data-cardSizes="6x6"
-       data-maxResults="6"></div>
-</div></section>
-
-
-<section class="dac-section dac-gray dac-small dac-invert" id="latest"><div class="wrap">
   <h2 class="norule">Latest</h2>
   <div class="resource-widget resource-flow-layout col-16"
        data-query="type:blog+tag:androidm,type:youtube+tag:androidm"
@@ -71,3 +54,17 @@
        data-maxResults="6"
        data-initial-results="3"</div>
 </div></section>
+
+
+<section class="dac-section dac-light"><div class="wrap">
+  <h1 class="dac-section-title">Resources</h1>
+  <div class="dac-section-subtitle">
+    Essential information to help you get your apps ready for Android M.
+  </div>
+  <div class="resource-widget resource-flow-layout col-16"
+       data-query="tag:previewresources"
+       data-cardSizes="6x6"
+       data-initial-results="6"
+       data-maxResults="16"></div>
+</div></section>
+