wURI: Parse an URL and extract its parts

This class can parse an URL and extract its parts.

It can take a given URL split into protocol, host name and URI and it creates an object that contains variables with the values of the URL parts.

Currently it contains variables for the protocol, complete URL location, server host name, complete URI part, parent directories of the URL path, file name extension, as well the result of the parse_url function.

By default the class parses the current request URL.