This provides an object oriented interface to things you want to know about
a file, such as extension, absolute path, relative path, size, filename
(without extension), etc. It is a sort of Swiss Army knife of file info.

A lot of times you need to know a file's absolute path, it's absolute
location, maybe it's relative location to something else (like DOCUMENT
ROOT), then you need to maybe know the relative path and relative location
for a file. You need to know if a file is a directory, what it's extension
is. You can commonly use regexes to do this.

This module provides commonly needed variables.