Remove Exhibition from site navigation for the Reference

Author: REAS

java_generate/templates/nav.web.template.html

@@ -4,7 +4,7 @@
 	<a href="/download/">Download</a><br />
 	<a href="/download/support.html">Donate</a><br /><br />
 
-	<a href="/exhibition/">Exhibition</a><br /><br />
+	<!--<a href="/api/public/proxy/github.com/exhibition/">Exhibition</a><br /><br />-->
 
 	<a href="/reference/" class="active">Reference</a><br />
 	<a href="/reference/libraries/">Libraries</a><br />