File System: Get a directory listing sorted by several options

This class can be used to get the listing of a directory sorted by several options.

It can get the listing of a given directory. The listing may contain only files, only directories or both.

The class may sort the listing by entry type, name, date, size and file name extension. The sorting may be either set to ascending or descending order.

It may also take a callback function to implement custom list filtering.