added stat worker files

Conflicts:
	app/controllers/manifestation_checkout_stats_controller.rb
	app/controllers/manifestation_reserve_stats_controller.rb
	app/controllers/user_checkout_stats_controller.rb
	app/controllers/user_reserve_stats_controller.rb
	app/models/manifestation_checkout_stat.rb
	app/models/manifestation_reserve_stat.rb
	app/models/user_checkout_stat.rb
	app/models/user_reserve_stat.rb
	spec/dummy/db/schema.rb
fixed dummy file