One To Many: Models
 Changes to be committed:
	new file:   app/assets/javascripts/registrations.js.coffee
	new file:   app/assets/stylesheets/registrations.css.scss
	new file:   app/controllers/registrations_controller.rb
	new file:   app/helpers/registrations_helper.rb
	modified:   app/models/event.rb
	new file:   app/models/registration.rb
	modified:   config/routes.rb
	new file:   db/migrate/20141118025458_create_registrations.rb
	modified:   db/schema.rb