Facilitates omniauth in the SessionsController
Changes ApplicationHelper#logout to #logout!
Allows for mass-assignment of User.uid and .provider
Removes image validation for User
Removes set_image form User and implements User::create_from_fb
Creates a Sign In via Facebook button on the Application layout
Requests specific information from Facebook
Adds message in Recipient::set_images
Adds line in seed file to seed recipient images