[jo] sample rails app

Sample Rails app for reference, build in Rails 4 / Ruby 2

commands to make this:

rails new                               -> create bare rails app
rails generate welcome index  -> generate welcome controller with index action

to run: 
rails s

references: 
http://guides.rubyonrails.org/getting_started.html
http://ruby.railstutorial.org/ruby-on-rails-tutorial-book
http://railscasts.com/