recaptcha api url changes

I've changed the default recaptcha api urls, as it does not work out of the box.
Changes made referring to:
https://developers.google.com/recaptcha/docs/display
https://developers.google.com/recaptcha/docs/verify
http://stackoverflow.com/questions/19841174/captcha-recaptcha-does-not-work-anymore

I saw that there were changes here before about same issues (#186), but that was reverted I don't know why. (Probably because of the wrong verify url?)

Should I make pull requests to the other branches too?