Update README.md with Missing CD page content

If you think your use of code examples falls outside fair use or the permission given here, feel free to contact us at <permissions@oreilly.com>.

Please note that the examples are not production code and have not been carefully testing. They are provided "as-is" and come with no warranty of any kind.

<h2>Missing CD-ROM</h2>

<p>You can access all of the files for this book in this repo.</p>

<h3>Chapter 1</h3>

<ul>

<li><a href="http://www.imaging-resource.com">Imaging-Resource</a>

</li>

<li><a href="http://www.dpreview.com">Digital Photography Review</a>

</li>

<li><a href="http://www.dcresource.com">Digital Camera Resource</a>

</li>

</ul>

<h3>Chapter 3</h3>

<ul>

<li><a href="http://www.porterscamerastore.com">Porter's Camera Store</a>

</li>

</ul>

<h3>Chapter 8</h3>

<ul>

<li><a href="http://www.riya.com">Riya</a>

</li>

</ul>

<h3>Chapter 10</h3>

<ul>

<li>waterfall.jpg</li>

<li>russian_box.jpg (Enlarge the view to at least 400 percent to see the difference

  you're making when resampling the photo.)</li>

</ul>

<h3>Chapter 11</h3>

<ul>

<li>finch.jpg</li>

<li>squirrel.jpg</li>

</ul>

<h3>Chapter 12</h3>

<ul>

<li>Ian Lyons' Adobe Gamma Utility <a href="http://www.computer-darkroom.com/ps8_colour/ps8_2.htm">tutorial</a></li>

<li>heron.jpg</li>

<li>shelfsitter.jpg</li>

</ul>

<h3>Chapter 13</h3>

<ul>

<li>pavillion1.jpg</li>

<li>pavillion2.jpg</li>

<li>pavillion3.jpg</li>

</ul>