adding omniauth.rb for facebook sign in config.
fixing typo for omniauth.rb config.
fixing errors so that login redirects to facebook with info on beeThree.
updated routes for facebook login. Added a sessions controller to handle logging in.
adding via to routes
added provider, facebood_id, oauth_token, oauth_expires_at, full_name to Users model.
updating user model for facebook login
fixing typo- oath to oauth.
added method for fetching current user.
fixing column references
updating callback to be a 'get'.
adding user sign-up to header.
Fixed bug with navbar and username.
adding field to grab user's email from facebook login.
Merge pull request #8 from cmcilhenny/facebook_authorization

facebook auth complete // pending addition of photo and location in future pull request