add .gitignore emacs config
biwakonbu tokens
Facebook sign up -> Routing Error is 'uninitialized constant SessionsController'
fix Devise, Omniauth settings
problem: Error, ActiveRecordStatementInvalid in Users::OmniauthCallbacksController#facebook
fix TODO: SQLite3::SQLException: no such column: users.provider: SELECT  "users".* FROM "users"  WHERE "users"."provider" = 'facebook' AND "users"."uid" = '100001697431823' LIMIT 1
fix Users table column
problem: Error, NameError in Users::OmniauthCallbacksController#facebook
fix TODO: undefined local variable or method `confirmed_at' for #<User:0x007f92b4652130>
fix Users table confirmed_at column
problem: Error, NoMethodError in Devise/sessions#new
fix TODO: undefined method `omniauth_authorize_path' for #<#<Class:0x007f8186ec8ee8>:0x007f8186ecc340>
Facebook sign up ok.