File Icon: Get the icon and other types of file metadata

This class can be used to retrieve icons and other types of metadata of a given file.

It can retrieve the icon image file name associated to a file based on the file name extension. It may also return <img> tags to display the file icon in HTML pages.

Several image files of graphic size 16x16 are provided to associate to many common file types.

The class can also retrieve the size of the file either in KB, MB or GB depending on how large the file is.

The class may also retrieve the file name extension, last change time, the file owner and the file group.