Deprecation of userinfo scope

Hi Peter,

I've started playing around with authomatic in the past couple of days. Seems a great little client library! I am just making changes in my fork for the deprecation of the userinfo scope and using the people.get api call. I thought about using https://www.googleapis.com/plus/v1/people/me/openIdConnect as this would response pretty much like the existing response, but opted to go for the default call as I plan on implementing G+ sign in at some point and will be consistent with using the APIs for plusers.