TODO:
- merge this with patternsets: FileSet extends PatternSet !!!
requires additional mods to the parsing algo
[HL] .... not sure if that really makes so much sense. I think
that perhaps they should use common utility class if there really
is that much shared functionality
public function __construct($dirset = null)
{
parent::__construct($dirset);
}
function __construct($fileset = null)
{
parent::__construct($fileset);
}