Implements (and demonstrates) a WORN 'filesystem' with Fuse on Go:
  Write Once, Read Never.

DEPS: https://github.com/hanwen/go-fuse
ALT-DEPS (deb-systems): git://github.com/abneptis/go-fuse.git


  Which is a bit of a misnomer, in that anything you create/write
to the mounted filesystem gets written to a tar-file of your choosing;

  It does NOT currently allow seeking even of open descriptors,
but at the end of it all, it's backed by a bytes.Buffer(), so
fixing that (while open!) should be doable if someones interested.

  The magic is that once you close the file, the header and data
is written to the tar-file (and not before!), so you must
have sufficient ram (or swap) on your system for the fuse-layer
to buffer the largest amount of outstanding (e.g., un-closed) descriptors
created by something utilizing the WORN.

  The filesystem (tar) is only closed (valid) at unmount, so
to avoid errors untarring your results, you'll need to unmount the FS.

  Currently, only standard file-types are supported.

  It's probably fragile as heck, so feel free to report bugs!