The content developed by this tutorial is presented as is.
Should be used solely for educational purposes and, therefore, without any other additional warranty.
All the material is free, even for commercial use - except in relation to the photographs - which can not be used for these same purposes.
It is not for us any responsibility for the proper or improper use of the freely proposed content.
It is up to each user to decide on its usability and applicability.
The displayed content can be changed or modified without any previous notice.