Update implementations.html

added Python JSON Spec

Author: johnnoone

implementations.html

@@ -62,6 +62,7 @@ <h3>Python</h3>
 	<ul>
 		<li><a id="link-impl-jsonschema" href="https://github.com/Julian/jsonschema">jsonschema</a> - <em>supports version 4</em> (MIT)</li>
 		<li><a id="link-impl-zyga-json-schema-validator" href="https://github.com/zyga/json-schema-validator">json-schema-validator</a> (LGPL)</li>
+		<li><a id="link-impl-johnoone-json-spec" href="https://github.com/johnnoone/json-spec">json-spec</a> cli and python library - <em>supports version 3 and 4</em> (BSD)</li>
 	</ul>
 
 	<h3>Ruby</h3>