Replace .jsx requires in .js to be able to require e.g. timeago using browserify

It's a bit a ugly hack but otherwise the `require()` call in the built `timeago.js` doesn't work.
Another option would be to rename all `js/*.jsx` files to `js/*.js` - I don't really see the point of having a different extension there, to be honest :) But this is my personal opinion and might conflict with your coding guidelines.