DigiOz Indexer: Retrieve and sort directory file listings

This class can be used to retrieve the listing of files and sub-directories of a directory.

It accesses a given directory and retrieves the list of all files and sub-directories into a bi-dimensional array.

The first dimension has the entry number of the file or directory. The second dimension has properties of the file or directory path, last modification time, and a flag of whether the entry is a file, a directory, or something else.

The listing may be sorted according to any of the file or directory properties.