We would like to thank everyone whose help made this project possible, but specially our supervisor, Fernando Cid. Thanks to his mentoring and his selfless and never ending help we have been able to carry out this project.

Furthermore, we would like to show our most sincere gratitude to other group tutors for helping us in certains aspects, resolving our doubts and answering our questions and (several) mails.

Finally, we also want to thank our classmates for their support, contributions and good work environment.