WARNING

This code is not nice. Is not clean. Doesn't follow good practices.

And above all, it doesn't reflect the way I work and how I write software nowdays.

It is an old project that I made and evolved as a student some years ago, that is still published and people use it. I intend to keep improving it in my spare time, but I don't expect do turn it into a piece of code I'm proud of showing.

Improvements and contributions are of course welcome.