Added fork on GitHub ribbon.

_layouts/default.html

@@ -41,6 +41,11 @@
             </ul>
         </nav>
         <div class="site-content">
+
+            <a href="https://github.com/codeguy/php-the-right-way">
+                <img style="position: absolute; top: 0; right: 0; border: 0;" src="https://s3.amazonaws.com/github/ribbons/forkme_right_darkblue_121621.png" alt="Fork me on GitHub">
+            </a>
+
             <header class="site-header" id="site-header">
                 <hgroup>
                     <h1 class="site-title"><a href="/">PHP</a></h1>