Reminder of google+ activation

_From [ambrosio...@gmail.com](https://code.google.com/u/114228919950760656985/) on January 30, 2012 15:01:29_

Added reminder of the activation of google+ service in API console.

**Attachment:** [authSample.html.patch](http://code.google.com/p/google-api-javascript-client/issues/detail?id=8)

_Original issue: http://code.google.com/p/google-api-javascript-client/issues/detail?id=8_
