docs: revisions to ndk download intro

inside of a virtual machine on the device. The fundamental Android application model

does not change.</p>

Using native code does not result in an automatic performance increase, 

<p>Using native code does not result in an automatic performance increase, 

but always increases application complexity. If you have not run into any limitations

using the Android framework APIs, you probably do not need the NDK. 

<p>Read <a href="<?cs var:toroot ?>sdk/ndk/overview.html">What is the NDK?</a>

to get an understanding of what the NDK offers and whether

it will be useful to you.

using the Android framework APIs, you probably do not need the NDK. Read <a 

href="<?cs var:toroot ?>sdk/ndk/overview.html">What is the NDK?</a> for more information about what

the NDK offers and whether it will be useful to you.

</p>

<p>

The NDK is designed for use <em>only</em> in conjunction with the

Android SDK, so if you have not already installed the latest Android SDK, please

Android SDK. If you have not already installed and setup the <a

href="http://developer.android.com/sdk/index.html">Android SDK</a>, please

do so before downloading the NDK. 

</p>

<p>Select the download package that is appropriate for your development

computer. </p>

  <table class="download">

    <tr>

      <th>Platform</th>