Need to be able to pass in the anti-focus option

Captcha is stealing focus on reload. Adding a 't' as the first parameter tells it to not steal focus.
https://groups.google.com/forum/#!topic/recaptcha/HYg5OYJU-uQ
Update vc-recaptcha.js

Recaptcha.reload requires a 't' be passed in to stop refocusing the response field. This argument is undocumented. It may have been the original authors intent to have many 'options' passed in as a string. e.g. "trnl" I changed this to be truthy but risk the api will add more options. Nothing an `===true` won't handle.
Merge pull request #2 from shanimal/master

Added ability to pass in the anti-focus option on reload