Updated google OAUTH2 details to match current deprecation plans
Merge branch 'master' of https://github.com/borealissw/simpleauth into borealissw-master

Fix for #28
Reverting .gitignore to its original state
Google OAuth 2.0 userinfo endpoint is now deprecated. Migrating to Plus API

according to https://developers.google.com/+/api/auth-migration#timetable
Merge branch 'googleplus'. Migrate to Plus API as described in
https://developers.google.com/+/api/auth-migration#timetable

Thanks @borealissw.

Closes #28.