Move 'Versioning' topic from overview to download page.

native_client_sdk/doc_generated/sdk/download.html

Index: native_client_sdk/doc_generated/sdk/download.html
diff --git a/native_client_sdk/doc_generated/sdk/download.html b/native_client_sdk/doc_generated/sdk/download.html
index d5b35ea20acf3ab1b78e658421b6a11f4426685e..9045bb9c188886cee233accdfa3cbb805c3da8ef 100644
--- a/native_client_sdk/doc_generated/sdk/download.html
+++ b/native_client_sdk/doc_generated/sdk/download.html
@@ -47,8 +47,17 @@ not install Xcode, you can download and build an <a class="reference external" h
 To build the program you may also need to download and install <a class="reference external" href="https://github.com/kennethreitz/osx-gcc-installer">gcc</a>.</li>
 <li>On Windows, the Native Client SDK includes a copy of GNU Make.</li>
 </ul>
-<h2 id="installing-the-sdk"><span id="id3"></span>Installing the SDK</h2>
-<h3 id="downloading-and-unzipping"><span id="id4"></span>Downloading and Unzipping</h3>
+<h2 id="versioning"><span id="id3"></span>Versioning</h2>
+<p>Chrome is released on a six week cycle, and developer versions of Chrome are
+pushed to the public beta channel three weeks before each release. As with any
+software, each release of Chrome may include changes to Native Client and the
+Pepper interfaces that may require modification to existing applications.
+However, modules compiled for one version of Pepper/Chrome should work with
+subsequent versions of Pepper/Chrome. The SDK includes multiple versions of the
+Pepper APIs to help developers make adjustments to API changes and take
+advantage of new features: <a class="reference external" href="/native-client/pepper_stable">stable</a>, <a class="reference external" href="/native-client/pepper_beta">beta</a> and <a class="reference external" href="/native-client/pepper_dev">dev</a>.</p>
+<h2 id="installing-the-sdk"><span id="id4"></span>Installing the SDK</h2>
+<h3 id="downloading-and-unzipping"><span id="id5"></span>Downloading and Unzipping</h3>
 <ol class="arabic">
 <li><p class="first">Download the <a class="reference external" href="http://storage.googleapis.com/nativeclient-mirror/nacl/nacl_sdk/nacl_sdk.zip">SDK update zip file</a>.</p>
 </li>
@@ -75,7 +84,7 @@ you have already downloaded.</p>
 </ul>
 </li>
 </ol>
-<h3 id="installing-the-stable-bundle"><span id="id5"></span>Installing the stable bundle</h3>
+<h3 id="installing-the-stable-bundle"><span id="id6"></span>Installing the stable bundle</h3>
 <ol class="arabic">
 <li><p class="first">To see the SDK bundles that are available for download, go to the
 <code>nacl_sdk</code> directory and run <code>naclsdk</code> with the <code>list</code> command. The SDK
@@ -139,7 +148,7 @@ $ ./naclsdk update pepper_36
 </pre>
 </li>
 </ol>
-<h2 id="updating-bundles"><span id="id6"></span>Updating bundles</h2>
+<h2 id="updating-bundles"><span id="id7"></span>Updating bundles</h2>
 <ol class="arabic">
 <li><p class="first">Run <code>naclsdk</code> with the <code>list</code> command. This shows you the list of available
 bundles and verifies which bundles you have installed.</p>
@@ -189,7 +198,7 @@ $ ./naclsdk update --force
 </pre>
 </li>
 </ol>
-<h2 id="help-with-the-naclsdk-utility"><span id="id7"></span>Help with the <code>naclsdk</code> utility</h2>
+<h2 id="help-with-the-naclsdk-utility"><span id="id8"></span>Help with the <code>naclsdk</code> utility</h2>
 <ol class="arabic">
 <li><p class="first">For more information about the <code>naclsdk</code> utility, run:</p>
 <p>On Mac/Linux:</p>
@@ -202,7 +211,7 @@ $ ./naclsdk help
 </pre>
 </li>
 </ol>
-<h2 id="next-steps"><span id="id8"></span>Next steps</h2>
+<h2 id="next-steps"><span id="id9"></span>Next steps</h2>
 <ul class="small-gap">
 <li>Browse the <a class="reference external" href="release-notes">Release Notes</a> for important
 information about the SDK and new bundles.</li>