[Refactoring]

  - Refactoring en la asignacion de la company
[Specs Requests]

  - Instalacion capybara, database_cleaner, launchy y factory_girl_rails
  - Configuracion capybara para rspec
  - Specs Requests: registracion, login, invitacion, nonconforming product,
    immediate action, corrective action y preventive action