Add informative logs

[apozog]

The library is totally missing informative logs to understand what it's doing and solve problems.
It's basically only logging exceptions.

Please, add LOGGER.infos and debugs all around.

[bnasslahsen]

@apozo-copyright,

Feel free to provide directly a PR and we will have a look at it.

[apozog]

Errrrr ... isn't the point of feature requests to see how many users demand the same? If you close it, that can't happen.