Add Google OAuth2 gem for omniauth. [#82382942]
Add initializer and update model for google auth. [#82382942]
update callbacks for google.  [#82382942]
Since google plus has a space in the name, we can't use the devise iterator for providers. [#82382942]
tweak login view a bit to separate omniauth from regular login. [#82382942]
Add more tests for omniauth scenarios. [#82382942]