add omniauth and omniauth-twitter to gem file
updated user.rb to include the omniauthable module
add application.yml file to hold all secret keys and update application.rb as per railscasts #85
updated to use twitter api key and api secret
generated omiauth_callbacks controller and updated devise routes to use this controller for callbacks
add columns provider and uid to user table
Twitter remote sign-in working still require email and name to complete sign-in with twitter
updated twitter callback to also pull user name