Add dragon.js.org subdomain

-   There is reasonable content on the page (see: [No Content](https://github.com/js-org/dns.js.org/wiki/No-Content))
-   I have read and accepted the [ToS](http://dns.js.org/terms.html)

cnames_active.js

@@ -131,6 +131,7 @@ var cnames_active = {
     ,"domtastic": "webpro.github.io/DOMtastic" //CF
     ,"dope": "fouad.github.io/dope"
     ,"draft": "D1SC0tech.github.io/draft.js"
+    ,"dragon": "sabertazimi.github.io/dragonjs"
     ,"du": "ruanyl.github.io/du"
     ,"duffn": "duffn.github.io"
     ,"dutchakdev": "dutchakdev.github.io"