Add citation.js.org

- 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

@@ -150,6 +150,7 @@ var cnames_active = {
 ,"christo": "christoga.github.io/js-org"
 ,"chronos": "espinielli.github.io/chronos" //noCF? (don´t add this in a new PR)
 ,"cineasta": "cineasta-js.github.io/cineasta-docs"
+,"citation": "larsgw.github.io/citation.js" //noCF
 ,"clause": "clausejs.github.io/clausejs"
 ,"clockwork": "clockworkdev.github.io/ClockworkWebsite"
 ,"clusterize": "nexts.github.io/Clusterize.js"