Adding social auth for Google (Oauth2).  Presence of login method already tested, no new tests without some serious selenium testing.
Added getenv() calls for social auth service keys
Merge pull request #1 from georgedorn/social_auth_google

Social auth google
skeletal dashboard wireframe (template, visible at /dashboard/) with nothing wired in
49373877: / now redirects to dashboard
(post-rebase) Merge branch 'personal/gordon-morehouse/dashboard01' of github.com:gordon-morehouse/share2grandma into personal/gordon-morehouse/dashboard01