PATH Reader: Add option to include hidden files (in windows)

Thanks Matt! Personally I think of this a little different: I *expect* the path reader to have super-powers (like most readers) and give me everything. If I care to filter out files with the Hidden attribute set, then I would check the option to retrieve file properties and filter for that attribute (which is actually not included in the current implementation, so it needs to be added). Makes sense? Thanks.