Add direct-schema to the list of implementations.

Author: IreneKnapp

implementations.html

@@ -101,6 +101,7 @@ <h2>JavaScript</h2>
     <li><a href="http://www.dojotoolkit.org/">Dojo</a>;</li>
     <li><a href="http://www.persvr.org/">Persevere</a> (modified BSD or AFL 2.0);</li>
     <li><a href="https://github.com/akidee/schema.js">schema.js</a>.</li>
+    <li><a href="http://github.com/IreneKnapp/direct-schema">direct-schema</a> (BSD);</li>
 </ul>
 
                 </div> <!-- class="span4" -->