Update rails 4.1.1 -> 4.1.2
Bundle devise (3.2.4)
rails g devise:install
rails generate devise User
Bundle omniauth-google-oauth2
Update rails 4.1.2 -> 4.1.4
Update rails_bootstrap_navbar 1.0.1 -> 2.0.1
Setup Google authentication
Merge branch 'omniauth-google'