Add a `.ruby-version` file setting Ruby version to 2.2.1
Add a `.ruby-version` file setting Ruby version to 2.2.1

kyan/foundation-rails-kyan,ibroadfo/foundation-rails,daslicious/foundation-rails,zurb/foundation-rails,zurb/foundation-rails,exciton/foundation-rails,daslicious/foundation-rails,exciton/foundation-rails,kyan/foundation-rails-kyan,ouvrages/foundation-rails,daslicious/foundation-rails,zsan/foundation-rails,zsan/foundation-rails,kyan/foundation-rails-kyan,ouvrages/foundation-rails,exciton/foundation-rails,ibroadfo/foundation-rails,ibroadfo/foundation-rails,ouvrages/foundation-rails,zsan/foundation-rails