Se agrego a created_at y updated_at a log_invoice - log_user_local
Se agregaron varios endpoints para la generacion de graficos
Merge branch 'master' of github.com:lealtag/api-cristo
Merge branch 'incomplete'
Merge branch 'master' of github.com:lealtag/api-cristo

Conflicts:
	app/controllers/analytics_controller.rb
	config/routes.rb