Notify User if the talk page exists

Upon typing a title, the plugin will check for the main page, the talk
page, a draft page in the format 'draft:title' and the talk page for the
draft, in that order of importance

Known issues: The error message flashes a little when the name is being
typed, due to the different namespaces being checked.

http://www.google-melange.com/gci/task/view/google/gci2014/5877487489777664
https://github.com/WPAFC/afch-rewrite/issues/26
I did try that, but it would return null for rawData[0] I looked into it, and the .then(1, 2) is the same as .done(1).fail(2)

http://api.jquery.com/deferred.then/
http://api.jquery.com/deferred.done/
http://api.jquery.com/deferred.fail/

I'm not 100% sure, but it works for me and the .done() does not