updated routes and Gemfile for facebook login feature
added fb login button
added authentication to Gemfile
added controller method to handle new third party authenticated users
added haml for FB login button
added route for new third party authenticated user
removed facebook login button, temporarily using bootstrap
added logic for returning fb users
added stylesheet and code for facebook login button
styled fabebok button
added styling for fb button
updated gem file
re-added files for handling failure of third_party authentication
fixed bug in index.haml
fixed another bug in index.haml
Changed sentence to proper English
added step definitions for 3rd party authentication
adjusted spacing in file
Refactored tests, added sad path
added User to step def