Added Twitter login button, and added passport-twitter as dependency
Login via Twitter implemented
Make sure Twitter auth can easily be turned off by commenting out its passport.use statement
Added generic method for adding OAUTH users.
Twitter Callback URL must be defined in env variable
Merge twitter-login branch
Fancify menu
Add passport-facebook dependency, and move passport-twitter from devDependencies section.
Add Facebook login option
Reference provider ID when registering OAUTH users locally
Put social login buttons in btn-group
Merge branch 'facebook-login'
Added passport-google dependency
Added Google login option.
Merge branch 'google-login'
Refactored common OAUTH code.
Changed all directives to use data-ng-* syntax