implementations.html: add Matic

Author: fge

implementations.html

@@ -78,6 +78,7 @@ <h2>JavaScript</h2>
     <li><a href="http://github.com/kriszyp/json-schema">json-schema</a>;</li>
     <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/mattyod/matic">Matic</a> (MIT)</li>
 </ul>
 </div>
 </div>