A file system provider for Zip files. Provides read-only file systems.
author: Adam Murdoch version: $Revision: 480428 $ $Date: 2006-11-28 22:15:24 -0800 (Tue, 28 Nov 2006) $
Creates a layered file system. This method is called if the file system
is not cached.
Parameters: scheme - The URI scheme. Parameters: file - The file to create the file system on top of. The file system.