docs: Preview 3 - Support page updates

- Add Key changes
- Add Known issues

Change-Id: I080b191a6609a4216e7521afa951b53f33609b90
diff --git a/docs/html/preview/setup-sdk.jd b/docs/html/preview/setup-sdk.jd
index d3327e8..a4d9418 100644
--- a/docs/html/preview/setup-sdk.jd
+++ b/docs/html/preview/setup-sdk.jd
@@ -16,56 +16,30 @@
   </div>
 </div>
 
-<p>The M Developer Preview SDK is available from the Android SDK Manager.
-This document assumes that you are familiar with Android app development, such
+<p>With Developer Preview 3, the official Android 6.0 SDK is now available from the Android SDK
+Manager. This document assumes that you are familiar with Android app development, such
 as using the Android SDK Manager and creating projects. If you are new to
 Android, see <a href="{@docRoot}training/basics/firstapp/index.html">Building Your First
-App</a> training lesson first.</a></p>
+App</a> training lesson first.</p>
+
 
 <h2 id="get-as13">Get Android Studio 1.3</h2>
 
-<p>The Developer Preview is best used with Android Studio 1.3, which is in
-preview status. It is highly recommended that you install the preview version of
-Android Studio 1.3 to work with the Preview SDK.</p>
+<p>
+  The Developer Preview is best used with Android Studio 1.3. It is highly recommended that
+  you install the Android Studio 1.3 to work with the Preview SDK and the final Android 6.0 SDK
+  provided with Preview 3. Please update your Android Studio installation to version 1.3 or
+  higher, or follow the instructions for
+  <a href="{@docRoot}sdk/installing/index.html?pkg=studio">Installing Android Studio</a>.
+</p>
 
-<p class="caution"><strong>Caution:</strong> The canary preview of Android
-Studio 1.3 is still in active development. If you are using your primary development
-machine to test the developer preview, you can create a second installation
-of Android Studio to use for testing.</p>
-
-<p>To install the Android Studio 1.3 preview:</p>
-
-<ol>
-  <li>Download and launch <a href="{@docRoot}tools/studio/index.html">Android
-  Studio</a>.
-  </li>
-
-  <li>Open the <strong>Settings</strong> window (on Windows, you can do this
-  by choosing <strong>File &gt; Settings</strong>). Choose the
-  <strong>Appearance &amp; Behavior &gt; System
-  Settings &gt; Updates</strong> panel.
-
-    <p class="aside">On OSX, you can find the <strong>Appearance &amp;
-    Behavior</strong> panel
-    in Android Studio's <strong>Preferences</strong> window.</p>
-  </li>
-
-  <li> On the <strong>Updates</strong> panel, choose the option
-  <strong>Automatically check updates for: Canary Channel</strong>.
-  </li>
-
-  <li>On the <strong>Updates</strong> panel, select <strong>Check Now</strong>
-  to check for the latest canary build. Download and install the build when you
-  are prompted.
-  </li>
-</ol>
 
 <h2 id="get-sdk">Get the Preview SDK</h2>
 
 <p>To add the Preview SDK components to your development environment:</p>
 
 <ol>
-  <li>Launch the Android Studio 1.3 preview.
+  <li>Launch Android Studio 1.3 or higher.
   </li>
 
   <li>Open the <strong>Settings</strong> window (on Windows, you can do this
@@ -73,13 +47,12 @@
   <strong>Appearance &amp; Behavior &gt; System
   Settings &gt; Updates</strong> panel.
 
-    <p class="aside">On OSX, you can find the <strong>Appearance &amp;
+    <p class="aside">On Mac OS X, you can find the <strong>Appearance &amp;
     Behavior</strong> panel
     in Android Studio's <strong>Preferences</strong> window.</p>
   </li>
 
-  <li>On the <strong>Updates</strong> panel, choose the options
-  <strong>Automatically check updates for: Canary Channel</strong> and
+  <li>On the <strong>Updates</strong> panel, choose the option for
   <strong>Automatically check updates for Android SDK: Preview Channel</strong>.
   </li>
 
@@ -135,7 +108,7 @@
 
 <ul>
   <li>Check <strong>Phone and Tablet</strong>.</li>
-  <li>Select <strong>MNC: Android M (Preview)</strong> in <strong>Minimum
+  <li>Select <strong>API 23: Android 6.0 (Marshmallow)</strong> in <strong>Minimum
     SDK</strong>.</li>
 </ul>
 
@@ -149,9 +122,8 @@
 </p>
 
 <ul>
-  <li><code>compileSdkVersion</code> is set to <code>'android-MNC'</code></li>
-  <li><code>minSdkVersion</code> is set to <code>'MNC'</code></li>
-  <li><code>targetSdkVersion</code> is set to <code>'MNC'</code></li>
+  <li><code>compileSdkVersion</code> is set to <code>'23'</code></li>
+  <li><code>targetSdkVersion</code> is set to <code>'23'</code></li>
 </ul>