Add preview docs dir, toc, and basic files.

Change-Id: I890dd21fed1217e4429f269eed5bada9a6faf2b4
diff --git a/docs/html/preview/index.jd b/docs/html/preview/index.jd
new file mode 100644
index 0000000..5988706
--- /dev/null
+++ b/docs/html/preview/index.jd
@@ -0,0 +1,73 @@
+page.title=Android N Developer Preview
+page.tags="preview",
+meta.tags="preview, devpreview", androidm
+fullpage=true
+forcelocalnav=true
+header.hide=1
+footer.hide=1
+@jd:body
+
+<section class="dac-expand dac-hero dac-light" >
+  <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="{@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-7of16 col-pull-9of16">
+        <h1 class="dac-hero-title">Android N Developer Preview</h1>
+        <p class="dac-hero-description">
+          <strong>Get your apps ready for the next version of Android.</strong>
+          Test on Nexus 5, 6, 9, and
+          Player. Explore what's new &mdash; <strong>multiwindow UI</strong>,
+          <strong>Doze Lite</strong> and <strong>Background Check</strong> power-saving features, new
+          <strong>notification</strong> capabilities, and more.
+        </p>
+
+        <a class="dac-hero-cta" href="{@docRoot}preview/overview.html">
+          <span class="dac-sprite dac-auto-chevron"></span>
+          Get started
+        </a><!--<br>
+        <a class="dac-hero-cta" href="{@docRoot}preview/support.html">
+          <span class="dac-sprite dac-auto-chevron"></span>
+          Update to Developer Preview (final SDK)
+        </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>
+
+<section class="dac-section dac-gray"><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="collection:preview/landing/more"
+       data-cardSizes="6x6"
+       data-maxResults="16"></div>
+
+    <ul class="dac-section-links">
+      <li class="dac-section-link">
+        <a href="https://code.google.com/p/android-developer-preview/">
+          <span class="dac-sprite dac-auto-chevron"></span>
+          Report Issues
+        </a>
+      </li>
+      <li class="dac-section-link"><a href="http://g.co/dev/AndroidMDevPreview">
+        <span class="dac-sprite dac-auto-chevron"></span>
+        Join G+ Community
+        </a>
+      </li>
+    </ul>
+  </div>
+</section>
+