github authentication

note: don't deploy this on the server without setting the necessary
config vars on heroku first, thanks.

urls.py

@@ -9,4 +9,5 @@ admin.autodiscover()
 urlpatterns = patterns('',
     url(r'^%s(?P<path>.*)$' % re.escape(settings.STATIC_URL.lstrip('/')), 'django.contrib.staticfiles.views.serve', {'insecure': True}),
     url(r'^admin/', include(admin.site.urls)),
+    url(r'', include('social_auth.urls')),
 )