Translation of the README to Portuguese (BR)

[rafaabc]

@GaelS Hi! Nice repository! It will help others like me as begginers.

As long as it is interesting the translation to Portuguese, this issue aims working on the translation from English to Portuguese of the README file.

It would be nice to contribute on this repo and hope you enjoy.

[GaelS]

It's a good idea, feel free to open a PR ! ;)

[rafaabc]

PR of this issue:

#7