unnks - NKS archive unpacker

Introduction
------------

unnks is a program that extracts data from the nks archives that are used by
several music synthesiser programs.  It is designed to have a similar
interface to GNU tar.  Instead of doing

  tar -xvf archive.tar,

just do

  unnks -xvf archive.nks,
  
or optionally

  unnks -C output_dir -xvf archive.nks


Limitations
-----------

1. Only extracting or listing archives is supported, unnks does not create new
   ones.

2. unnks can only extract one type of file, which is typically used for sound
   samples.  nks archives can contain additional data that unnks does not know
   how to extract.

3. The archives that are being extracted must be seekable files.  Extracting
   from stdin or other non-seekable streams is not supported.

Unavowed (unavowed at vexillium org)

Thanks to Gynvael Coldwind for pointing out bugs in the code :-)