package ZipRebel as a file-system implementation

[nemecec]

I would like to take advantage of this super-efficient compression algorithm in a transparent manner. For that, it would be super-useful to package ZipRebel as a file-system implementation that would apply the compression on-the-fly.

But I guess we first need to figure out how to decompress compressed files. For now, we could at least apply it before sending files to /dev/null, dramatically reducing load on the "null" device.