[JW Lua] Creating a new directory

[Jan Angermüller]

Jari,

could you please add a function for adding a new (sub-)folder ?
It's of course possible to do it with something like os.execute(),
but it would be great to have it handled internally.

If you want to restrict rights, you may limit it to creating the directory
for example in the plug-ins or the configuration folder and only with
the plug-in's name. That would also be ok for me.

Best regards,
Jan