GP social login

Allows users to log in to WordPress using Google+ or Facebook.
Adds a configuration panel under Settings where users can set API keys.
Upon successful login, depending on the service, users will be redirected to either:

— www.mywebsite.com/facebookcallback/
— www.mywebsite.com/googlecallback/

• Trailing slash is mandatory.
  After that the user will be sent to the destination url set in the Settings panel.

Theming

Both links have a common CSS class: “gp_sociallogin”.
Google’s login link has a specific class: “google”.
Facebook’s login link has a specific class: “facebook”.