Create a script to read files in the current directory

[Geal]

The logs script provided with the tutorial has issues with user rights, and not everyone has the same layout for logs.

There will be a new script in the tutorial, to read file in the home directory. That way, there will be no rights issue.

[Geal]

I changed the logs script to parse the /var/log directory, display a list of all the subdirectories and files (except the .gz). Tapping on a file displays it, tapping on a directory displays its content, etc.