Documentation improvements for recursive file system

[btk]

I proposed an improvement at #28

And it has implemented in #30

Now we need to change the documentation (Readme.md) relative to the changes. And we should add an example use of the recursive system.

Its a good first task to take on for Hacktoberfest 🥇

[hanstf]

Hi let me do it

check my latest pull request

thanks.

[btk]

#41 Thanks