Per P0 reqs add launch pts + make download obvious. Also misc cpy edits.

native_client_sdk/doc_generated/sdk/download.html

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 <section id="download-the-native-client-sdk">
 <span id="download"></span><h1 id="download-the-native-client-sdk"><span id="download"></span>Download the Native Client SDK</h1>
-<p>To build Native Client modules, you must download and install the Native
-Client Software Development Kit (SDK). This page provides an overview
-of the Native Client SDK, and instructions for how to download and
-install the SDK.</p>
-<h2 id="overview">Overview</h2>
+<p>To build Native Client modules, you must download and install the Native Client
+Software Development Kit (SDK). This page provides an overview of the Native
+Client SDK, and instructions for how to download and install the SDK.</p>
+<div id="home">
+<a class="button-nacl button-download" href="http://storage.googleapis.com/nativeclient-mirror/nacl/nacl_sdk/nacl_sdk.zip">Download SDK Zip File</a>
+</div><h2 id="overview">Overview</h2>
 <p>The Native Client SDK includes the following:</p>
-<dl class="docutils">
-<dt>support for multiple Pepper versions</dt>
-<dd>The SDK contains <strong>bundles</strong> that let you compile Native Client modules
-using different versions of the
-<a class="reference internal" href="/native-client/overview.html#link-pepper"><em>Pepper Plugin API</em></a> (e.g., Pepper 31 or Pepper Canary). Review the
-<a class="reference internal" href="/native-client/sdk/release-notes.html"><em>Release Notes</em></a> for a description of the new features
-included in each Pepper version to help you decide which bundle to
-use to develop your application. In general, Native Client modules
-compiled using a particular Pepper version will work in
-corresponding versions of Chrome and higher. For example, a module
-compiled using the Pepper 31 bundle will work in Chrome 31 and
-higher.</dd>
-<dt>update utility</dt>
-<dd>The <code>naclsdk</code> utility (<code>naclsdk.bat</code> on Windows) lets you download new
-bundles that are available, as well as new versions of existing bundles.</dd>
-<dt>toolchains</dt>
-<dd>Each platform includes three toolchains: one for compiling
-Portable Native Client (PNaCl) applications, one for compiling
-architecture-specific Native Client applications with newlib, and
-one for compiling architecture-specific Native Client applications with glibc.
-Newlib and glibc are two different implementations
-of the C standard library. All three toolchains contain
-Native Client-compatible versions of standard compilers, linkers,
-and other tools. See <a class="reference internal" href="/native-client/nacl-and-pnacl.html"><em>NaCl and PNaCl</em></a> to help
-you choose the right toolchain.</dd>
-<dt>examples</dt>
-<dd>Each example in the SDK includes C or C++ source files and header files
-illustrating how to use NaCl and Pepper, along with a Makefile to build
-the example using each of the toolchains.</dd>
-<dt>tools</dt>
-<dd>The SDK includes a number of additional tools that you can use for
-tasks such as validating Native Client modules and running modules
-from the command line.</dd>
-</dl>
+<ul class="small-gap">
+<li><strong>Support for multiple Pepper versions</strong> to compile for specific minimum
+versions of Chrome.</li>
+<li><strong>Update utility</strong> to download new bundles that are available, as well as new
+versions of existing bundles.</li>
+<li><strong>Toolchains</strong> to compile for Portable Native Client (PNaCl), traditional
+Native Client (NaCl), and for compiling architecture-specific Native Client
+applications with glibc.</li>
+<li><strong>Examples</strong> Including C or C++ source files and header files illustrating
+how to use NaCl and Pepper, and Makefiles to build the example with each of
+the toolchains.</li>
+<li><strong>Tools</strong> for validating Native Client modules and running modules from the
+command line.</li>
+</ul>
 <p>Follow the steps below to download and install the Native Client SDK.</p>
 <h2 id="prerequisites">Prerequisites</h2>
 <ul class="small-gap">
-<li><p class="first"><strong>Python:</strong> Make sure you have Python 2.6 or 2.7 installed, and that the
-Python executable is in your path.</p>
+<li><p class="first"><strong>Python 2.6 or 2.7:</strong> Make sure that the Python executable is in your path.
+Python 2.7 is preferred. Python 3.x is not yet supported.</p>
 <ul class="small-gap">
-<li>On Mac/Linux, Python is likely preinstalled. Run the command <code>&quot;python
--V</code>&#8221; in a terminal window, and make sure that the version of Python you
-have is 2.6.x or 2.7.x (if it&#8217;s not, upgrade to one of those versions).</li>
+<li>On Mac and Linux, Python is likely preinstalled. Run the command &#8220;<code>python
+-V</code>&#8221; in a terminal window, and make sure that the version you have is 2.6.x
+or 2.7.x.</li>
 <li>On Windows, you may need to install Python. Go to
 <a class="reference external" href="http://www.python.org/download/">http://www.python.org/download/</a> and
 select the latest 2.x version. In addition, be sure to add the Python
 directory (for example, <code>C:\python27</code>) to the PATH <a class="reference external" href="http://en.wikipedia.org/wiki/Environment_variable">environment
-variable</a>. After
-you&#8217;ve installed Python, run the command <code>&quot;python -V</code>&#8221; in a Command
-Prompt window and verify that the version of Python you have is 2.6.x or
-2.7.x.</li>
-<li>Note that Python 3.x is not yet supported.</li>
+variable</a>. Run
+&#8220;<code>python -V</code>&#8221; from a command line to verify that you properly configured
+the PATH variable.</li>
 </ul>
 </li>
 <li><strong>Make:</strong> On the Mac, you need to install the <code>make</code> command on your system
 before you can build and run the examples in the SDK. One easy way to get
 <code>make</code>, along with several other useful tools, is to install
 <a class="reference external" href="https://developer.apple.com/technologies/tools/">Xcode Developer Tools</a>.
-After installing Xcode, go to the Preferences menu, select
-Downloads and Components, and verify that Command Line Tools are installed.
-If you&#8217;d rather not install Xcode, you can download and build an
-<a class="reference external" href="http://mac.softpedia.com/dyn-postdownload.php?p=44632&amp;t=4&amp;i=1">open source version</a> of
-<code>make</code>. In order to build the command you may also need to download and
-install a copy of <a class="reference external" href="https://github.com/kennethreitz/osx-gcc-installer">gcc</a>.</li>
+After installing Xcode, go to the XCode menu, open the Preferences dialog box
+then select Downloads and Components. Verify that Command Line Tools are
+installed. If you&#8217;d rather not install Xcode, you can download and build an
+<a class="reference external" href="http://mac.softpedia.com/dyn-postdownload.php?p=44632&amp;t=4&amp;i=1">open source version</a> of <code>make</code>.
+To build the command you may also need to download and install
+<a class="reference external" href="https://github.com/kennethreitz/osx-gcc-installer">gcc</a>.</li>
 </ul>
-<h2 id="download-and-install-the-sdk">Download and install the SDK</h2>
+<h2 id="installing-the-sdk">Installing the SDK</h2>
 <ol class="arabic">
-<li><p class="first">Download the SDK update utility: <a class="reference external" href="http://storage.googleapis.com/nativeclient-mirror/nacl/nacl_sdk/nacl_sdk.zip">nacl_sdk.zip</a>.</p>
+<li><p class="first">Download the SDK update zip file: <a class="reference external" href="http://storage.googleapis.com/nativeclient-mirror/nacl/nacl_sdk/nacl_sdk.zip">nacl_sdk.zip</a>.</p>
 </li>
-<li><p class="first">Unzip the SDK update utility:</p>
+<li><p class="first">Unzip the file:</p>
 <ul class="small-gap">
 <li><p class="first">On Mac/Linux, run the command &#8220;<code>unzip nacl_sdk.zip</code>&#8221; in a terminal
 window.</p>
 </li>
 <li><p class="first">On Windows, right-click on the .zip file and select &#8220;Extract All...&#8221;. A
 dialog box will open; enter a location and click &#8220;Extract&#8221;.</p>
 </li>
 </ul>
-<p>Unzipping the SDK update utility creates a directory called <code>nacl_sdk</code> with
-the following files and directories:</p>
+<p>A directory is created called <code>nacl_sdk</code> with the following files and
+directories:</p>
 <ul class="small-gap">
-<li><p class="first"><code>naclsdk</code> (and <code>naclsdk.bat</code> for Windows) &#8212; the front end of the update
-utility, i.e., the command you run to download the latest bundles</p>
+<li><p class="first"><code>naclsdk</code> (and <code>naclsdk.bat</code> for Windows) &#8212; the update utility,
+which is the command you run to download and update bundles.</p>
 </li>
 <li><p class="first"><code>sdk_cache</code> &#8212; a directory with a manifest file that lists the bundles
-you have already downloaded</p>
+you have already downloaded.</p>
 </li>
-<li><p class="first"><code>sdk_tools</code> &#8212; the back end of the update utility, also known as the
-&#8220;sdk_tools&#8221; bundle</p>
+<li><p class="first"><code>sdk_tools</code> &#8212; the code run by the <code>naclsdk</code> command.</p>
 </li>
 </ul>
 </li>
-<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>&quot;list&quot;</code> command.
-The SDK includes a separate bundle for each version of Chrome/Pepper.</p>
+</ol>
+<h2 id="installing-bundles">Installing bundles</h2>
+<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 &#8220;<code>list</code>&#8221; command. The
+SDK includes a separate bundle for each version of Chrome/Pepper.</p>
 <p>On Mac/Linux:</p>
 <pre class="prettyprint">
 $ cd nacl_sdk
 $ ./naclsdk list
 </pre>
 <p>On Windows:</p>
 <pre class="prettyprint">
 &gt; cd nacl_sdk
 &gt; naclsdk list
 </pre>
 <p>You should see output similar to this:</p>
 <pre class="prettyprint">
 Bundles:
  I: installed
  *: update available
 
   I  sdk_tools (stable)
      vs_addin (dev)
-     pepper_27 (post_stable)
-     pepper_28 (post_stable)
-     pepper_29 (post_stable)
-     pepper_30 (post_stable)
-     pepper_31 (stable)
-     pepper_32 (beta)
+     pepper_31 (post_stable)
+     pepper_32 (post_stable)
+     pepper_33 (post_stable)
+     pepper_34 (post_stable)
+     pepper_35 (stable)
+     pepper_36 (beta)
+     pepper_37 (dev)
      pepper_canary (canary)
+     bionic_canary (canary)
 </pre>
-<p>The sample output above shows that there are a number of bundles available
-for download, and that you have already installed the latest revision of the
-<code>sdk_tools</code> bundle (it was included in the zip file you downloaded).
-Each bundle is labeled post-stable, stable, beta, dev, or canary.
-These labels usually correspond to the current versions of
-Chrome. (In the example above, Chrome 31 is stable, Chrome 32 is beta, etc.).
-We generally recommend that you download and use a &#8220;stable&#8221; bundle,
-as applications developed with &#8220;stable&#8221; bundles can be used by all current
+<p>The sample output above shows that several bundles are available for
+download, and that you have already installed the latest revision of the
+<code>sdk_tools</code> bundle. (It was included in the zip file you downloaded.) Each
+bundle is labeled post-stable, stable, beta, dev, or canary. These labels
+usually correspond to the current versions of Chrome.</p>
+<p>We recommend that you download and use a &#8220;stable&#8221; bundle, because
+applications developed with &#8220;stable&#8221; bundles can be used by all current
 Chrome users. This is because Native Client is designed to be
 backward-compatible (for example, applications developed with the
-<code>pepper_31</code> bundle can run in Chrome 31, Chrome 32, etc.).
-Thus in the example above, <code>pepper_31</code> is the recommended bundle to use.</p>
+<code>pepper_31</code> bundle can run in Chrome 31, Chrome 32, etc.).</p>
 </li>
 <li><p class="first">Run <code>naclsdk</code> with the &#8220;update&#8221; command to download recommended bundles.</p>
 <p>On Mac/Linux:</p>
 <pre class="prettyprint">
 $ ./naclsdk update
 </pre>
 <p>On Windows:</p>
 <pre class="prettyprint">
 &gt; naclsdk update
 </pre>
-<p>By default, <code>naclsdk</code> only downloads bundles that are
-recommended&#8212;generally those that are &#8220;stable.&#8221; Continuing with the earlier example, the
-&#8220;update&#8221; command would only download the <code>pepper_31</code>
-bundle, since the bundles <code>pepper_32</code> and greater are not yet stable.
-If you want the <code>pepper_32</code> bundle, you must ask for it explicitly:</p>
+<p>By default, <code>naclsdk</code> only downloads bundles that are recommended&#8212;
+generally those that are &#8220;stable.&#8221; Continuing with the earlier example, the
+&#8220;update&#8221; command would only download the <code>pepper_35</code> bundle, since the
+bundles <code>pepper_36</code> and greater are not yet stable. If you want the
+<code>pepper_36</code> bundle, you must ask for it explicitly:</p>
 <pre class="prettyprint">
-$ ./naclsdk update pepper_32
+$ ./naclsdk update pepper_36
 </pre>
-<p>Note that you never need to update the <code>sdk_tools</code> bundle&#8212;it is
-updated automatically (if necessary) whenever you run <code>naclsdk</code>.</p>
 </li>
 </ol>
 <aside class="note">
-The minimum SDK bundle that supports PNaCl is <code>pepper_31</code>.
+<blockquote>
+<div>You never need to update the <code>sdk_tools</code> bundle. It is updated
+automatically (if necessary) whenever you run <code>naclsdk</code>.</div></blockquote>
+
 </aside>
-<h2 id="staying-up-to-date-and-getting-new-versions-of-bundles">Staying up-to-date and getting new versions of bundles</h2>
+<h2 id="updating-bundles">Updating bundles</h2>
 <ol class="arabic">
-<li><p class="first">Run <code>naclsdk</code> with the &#8220;list&#8221; command again; this will show you the list of
-available bundles and verify which bundles you have installed.</p>
+<li><p class="first">Run <code>naclsdk</code> with the &#8220;list&#8221; command. This shows you the list of available
+bundles and verifies which bundles you have installed.</p>
 <p>On Mac/Linux:</p>
 <pre class="prettyprint">
 $ ./naclsdk list
 </pre>
 <p>On Windows:</p>
 <pre class="prettyprint">
 &gt; naclsdk list
 </pre>
-<p>Continuing with the earlier example, if you previously downloaded the
-<code>pepper_31</code> bundle, you should see output similar to this:</p>
+<p>If an update is available, you&#8217;ll see something like this.:</p>
 <pre class="prettyprint">
 Bundles:
  I: installed
  *: update available
 
   I  sdk_tools (stable)
      vs_addin (dev)
-     pepper_27 (post_stable)
-     pepper_28 (post_stable)
-     pepper_29 (post_stable)
-     pepper_30 (post_stable)
-  I  pepper_31 (stable)
-     pepper_32 (beta)
+     pepper_31 (post_stable)
+     pepper_32 (post_stable)
+     pepper_33 (post_stable)
+     pepper_34 (post_stable)
+  I* pepper_35 (stable)
+     pepper_36 (beta)
+     pepper_37 (dev)
      pepper_canary (canary)
+     bionic_canary (canary)
+</pre>
+<p>An asterisk next to a bundle indicates that there is an update available it.
+If you run &#8220;<code>naclsdk update</code>&#8221; now, it warns you with a message similar to
+this:</p>
+<pre class="prettyprint">
+WARNING: pepper_35 already exists, but has an update available. Run update
+with the --force option to overwrite the existing directory. Warning: This
+will overwrite any modifications you have made within this directory.
 </pre>
 </li>
-<li><p class="first">Running <code>naclsdk</code> with the &#8220;update&#8221; command again will verify that your
-bundles are up-to-date, or warn if you there are new versions of previously
-installed bundles.</p>
-<p>On Mac/Linux:</p>
-<pre class="prettyprint">
-$ ./naclsdk update
-</pre>
-<p>On Windows:</p>
-<pre class="prettyprint">
-&gt; naclsdk update
-</pre>
-<p>Continuing with the earlier example, you should see output similar to this:</p>
-<pre class="prettyprint">
-pepper_31 is already up-to-date.
-</pre>
-</li>
-<li><p class="first">To check if there is a new version of a previously installed bundle, you can
-run the &#8220;list&#8221; command again:</p>
-<pre class="prettyprint">
-Bundles:
- I: installed
- *: update available
-
-  I  sdk_tools (stable)
-     vs_addin (dev)
-     pepper_27 (post_stable)
-     pepper_28 (post_stable)
-     pepper_29 (post_stable)
-     pepper_30 (post_stable)
-  I* pepper_31 (stable)
-     pepper_32 (beta)
-     pepper_canary (canary)
-</pre>
-<p>An asterisk next to a bundle indicates that there is an update
-available for that bundle. If you run  the &#8220;update&#8221; command now,
-<code>naclsdk</code> will warn you with a message similar to this:</p>
-<pre class="prettyprint">
-WARNING: pepper_31 already exists, but has an update available.
-Run update with the --force option to overwrite the existing directory.
-Warning: This will overwrite any modifications you have made within this directory.
-</pre>
-<p>To dowload the new version of a bundle and overwrite the existing directory
-for that bundle, run <code>naclsdk</code> with the <code>--force</code> option.</p>
+<li><p class="first">To download and install the new bundle, run:</p>
 <p>On Mac/Linux:</p>
 <pre class="prettyprint">
 $ ./naclsdk update --force
 </pre>
 <p>On Windows:</p>
 <pre class="prettyprint">
 &gt; naclsdk update --force
 </pre>
 </li>
+</ol>
+<h2 id="help-with-the-naclsdk-utility">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>
 <pre class="prettyprint">
 $ ./naclsdk help
 </pre>
 <p>On Windows:</p>
 <pre class="prettyprint">
 &gt; naclsdk help
 </pre>
 </li>
 </ol>
-<p>Next steps:</p>
+<p><strong>Next steps:</strong></p>
 <ul class="small-gap">
-<li>Browse through the <a class="reference internal" href="/native-client/sdk/release-notes.html"><em>Release Notes</em></a> for important
+<li>Browse through the <a class="reference external" href="release-notes">Release Notes</a> for important
 information about the SDK and new bundles.</li>
-<li>If you&#8217;re just getting started with Native Client, we recommend reading
-the <a class="reference internal" href="/native-client/overview.html"><em>Technical Overview</em></a> and walking through the
-<a class="reference internal" href="/native-client/devguide/tutorial/tutorial-part1.html"><em>Getting Started Tutorial</em></a>.</li>
+<li>If you&#8217;re just starting with Native Client, we recommend reading the
+<a class="reference external" href="../overview">Technical Overview</a> and walking through the
+<a class="reference external" href="/devguide/tutorial/tutorial-part1">Getting Started Tutorial</a>.</li>
 <li>If you&#8217;d rather dive into information about the toolchains, see
-<a class="reference internal" href="/native-client/devguide/devcycle/building.html"><em>Building Native Client Modules</em></a>.</li>
+<a class="reference external" href="/devguide/devcycle/building">Building Native Client Modules</a>.</li>
 </ul>
 </section>
 
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