This project based on this pull-request.
- Include bootstrap datepicker in Gemfile:
gem 'bootstrap-datepicker', :git => 'git://github.com/rilya/bootstrap-datepicker.git'
- Add stylesheet file to app/assets/stylesheets/application.css
*= require datepicker
- Add javascript files to app/assets/javascripts/application.js
//= require datepicker