Wrapper for Tcl 8.4's new Virtual File System layer by Vince Darley
===================================================================

  Rev 0.12: Remove hard-coded include path, disable librarypath for now
  Rev 0.11: Switched back to vfs::filesystem
  Rev 0.10: Initial release


This is a thin wrapper around "vfs.c", from the TclVFS project, see:
    http://sourceforge.net/projects/tclvfs
VFS can only be used as of Tcl 8.4 (now in alpha).  Usage:

    vfs::filesystem info ?path?
    	without arg: list all mount point, with arg: list mount cmd

    vfs::filesystem mount ?-volume? path cmd
    	mount the specified path, using "cmd" as driver for this area

    vfs::filesystem unmount path
    	unmount the specified path

Historical note: the Virtual File System (VFS) is an idea by Matt Newman,
who initally coded a nearly 100% pure Tcl version it for use in TclKit.
The current implementation is now part of the Tcl core, and provides a
high degree of compatibility with the Tcl test suite.