Fix broken links on landing page.

native_client_sdk/src/doc/index.rst

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 Welcome to Native Client
 ########################
 
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   <div id="home">
   <div class="pull-quote">To get the SDK and<br/>installation instructions<br/>
   <a href="/native-client/sdk/download.html">visit the SDK Download page</a>.
   </div>
   <div class="big-intro">
 
 **Native Client** is a sandbox for running compiled C and C++ code in the
 browser efficiently and securely, independent of the user's operating system.
 **Portable Native Client** extends that technology with
 architecture independence, letting developers compile their code once to run
 in any website and on any architecture.
 
 In short, Native Client brings the **performance** and **low-level control**
 of native code to modern web browsers, without sacrificing the **security** and
 **portability** of the web. Watch the video below for an overview of
 Native Client, including its goals, how it works, and how
 Portable Native Client lets developers run native compiled code on the web. 
 
 .. Note::
   :class: note
 
   This site uses several examples of Native Client. For the best experience,
-  consider downloading the `latest version of Chrome <http://www.google.com/chrome/>`_.
-  When you come back, be sure to `check out our demos 
-  <https://gonativeclient.appspot.com/demo>`_.
+  consider downloading the `latest version of Chrome 
+  <http://www.google.com/chrome/>`_. When you come back, be sure to `check out
+  our demos <https://gonativeclient.appspot.com/demo>`_.
 
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   </div>
 
   <iframe class="video" width="600" height="337"
   src="//www.youtube.com/embed/MvKEomoiKBA?rel=0" frameborder="0"></iframe>
   <div class="big-intro">
   
 Two Types of Modules
 ====================
 
 Native Client comes in two flavors.
 
-* **Portable Native Client (PNaCl)**: Pronounced 'pinnacle', PNaCl runs single, portable (**pexe**) executables and is available
-  in most implementations of Chrome. A translator built into Chrome
-  translates the pexe into native code for the client hardware. The entire
-  module is translated before any code is executed rather than as the code is
-  executed. PNaCl modules can be hosted from any web server.
+* **Portable Native Client (PNaCl)**: Pronounced 'pinnacle', PNaCl runs single,
+  portable (**pexe**) executables and is available in most implementations of
+  Chrome. A translator built into Chrome translates the pexe into native code
+  for the client hardware. The entire module is translated before any code is
+  executed rather than as the code is executed. PNaCl modules can be hosted from
+  any web server.
 * **Native Client (NaCl)**: Also called traditional or non-portable Native
-  Client, NaCl runs  
-  architecture-dependent (**nexe**) modules, which are packaged into an
-  application. At runtime, the browser decides which nexe to load based on the
-  architecture of the client machine. NaCl modules must be run from the `Chrome
-  Web Store (CWS) <https://chrome.google.com/webstore/category/apps>`_.
-  Fortunately, work from PNaCl modules can be used to create NaCl modules. 
+  Client, NaCl runs architecture-dependent (**nexe**) modules, which are
+  packaged into an application. At runtime, the browser decides which nexe to
+  load based on the architecture of the client machine. NaCl modules must be run
+  from the `Chrome Web Store (CWS) 
+  <https://chrome.google.com/webstore/category/apps>`_. Fortunately, work from
+  PNaCl modules can be used to create NaCl modules. 
   
-These flavors are described in more depth in `PNaCl and NaCl <nacl-and-pnacl>`_
+These flavors are described in more depth in :doc:`PNaCl and NaCl 
+<nacl-and-pnacl>`
 
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   <div class="left-side">
   <div class="left-side-inner">
   <h2>Hello World</h2>
   <div class="big-intro">
 
-To jump right in `take the tutorial <devguide/tutorial/tutorial-part1>`_ that walks you through a basic web 
-application for Portable Native Client (PNaCl). This is a client-side 
-application that uses HTML, JavaScript, and a Native Client module written in C++.
+To jump right in :doc:`take the tutorial <devguide/tutorial/tutorial-part1>`
+that walks you through a basic web application for Portable Native Client
+(PNaCl). This is a client-side application that uses HTML, JavaScript, and a
+Native Client module written in C++.
 
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   </div>
   </div>
   </div>
   <h2>A Little More Advanced</h2>
   <div class="big-intro">
 
-If you've already got the basics down, you're probably trying to get a real application ready for production. You're `building </devguide/devcycle/building>`_, `debugging </devguide/devcycle/debugging>`_ or `ready to distribute </devguide/distributing>`_.
+If you've already got the basics down, you're probably trying to get a real
+application ready for production. You're :doc:`building 
+<devguide/devcycle/building>`, :doc:`debugging <devguide/devcycle/debugging>`
+or :doc:`ready to distribute <devguide/distributing>`.
 
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   </div>
 
   <div class="left-side">
   <div class="left-side-inner">
   <h2>Nuts and Bolts</h2>
   <div class="big-intro">
   
-You've been working on a Native Client module for a while now and you've run into an arcane problem. You may need to refer to the `PNaCl Bitcode Reference </reference/pnacl-bitcode-abi>`_ or the `Sandbox internals </sandbox_internals/index>`_.
+You've been working on a Native Client module for a while now and you've run
+into an arcane problem. You may need to refer to the :doc:`PNaCl Bitcode
+Reference <reference/pnacl-bitcode-abi>` or the :doc:`Sandbox internals 
+<reference/sandbox_internals/index>`.
 
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   </div>
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   </div>
 
 I Want to Know Everything
 =========================
 
-So, you like to read now and try later. Start with our `Technical Overview </overview>`_
+So, you like to read now and try later. Start with our :doc:`Technical Overview
+<overview>`
 
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   <div class="big-intro" style="clear: both;">
 
-Send us questions, comments, and feedback:
-`native-client-discuss <https://groups.google.com/forum/#!forum/native-client-discuss>`_.
+Send us questions, comments, and feedback: `native-client-discuss 
+<https://groups.google.com/forum/#!forum/native-client-discuss>`_.
 
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   </div>