document coco and livescript

website/guide/compatibility.html

@@ -39,6 +39,16 @@ print 'version: ' + Duktape.version
 }).call(this);
 </pre>
 
+<h2 id="compatibility-coco">Coco</h2>
+
+<p>Like CoffeeScript, <a href="https://github.com/satyr/coco">Coco</a> compiles to
+Javascript.  There are no known issues.</p>
+
+<h2 id="compatibility-livescript">LiveScript</h2>
+
+<p>Like CoffeeScript, <a href="http://livescript.net/">LiveScript</a> compiles to
+Javascript.  There are no known issues.</p>
+
 <h2 id="compatibility-underscorejs">Underscore.js</h2>
 
 <p><a href="http://underscorejs.org/">Underscore.js</a> provides a lot of