add secrets example file
add uid column
add omniauth Facebook & Twitter
add uid column to schema
add omniauth to user model
add omniauth controller
change schema order
add omniauth keys for devise
add real links
add function to find facebook user via oauth
add omniauth controllers for users
remove spaces in username
fix Facebook issue
add logout link
add twitter authentification system
rubocop cleanup
Merge branch 'add-facebook-twitter-auth'