added omniauth with facebook

added provider and uid attributes to user

added omniauth to devise config

added omniauthable module to user

added omniauth callbacks controller

find or create user with omniauth login

added omniauth_callbacks#facebook

integrate existing users if sign in through oauth
use env variables for facebook app id and secret
deleted rails image
added home page
added dev debug dumps
fixed mass-assign phone_number
augment facebook sign up with phone number
added name to user
added phone number to users
added different view for signed in user
added twilio gem
added sms routes