added gems for development
added the models for the application: user, confort, car and rent
added the authentication link; added the controllers for the application (cars, rents and users)
added logic for the CRUD of Cars
added logic for the rentings; datepickers from jquery
Added cancan for permissions; three roles: manager, client and guest; added seeds for the managers of the store
added checking availability within a car
adding front-end gems
finished implementing small details
finished applying twitter bootstrap and simple form