Start work on Akai sample lister / reader

For the moment, all it does is convert "AKAII" to ASCII.  It does
this quite well so far, using a dd-based rip of an Akai sample CD
to test with, e.g.:

head -c 1024 < ~/temp/akai-mellotron.bin | ./a.out | less
Optimise code

I'm not entirely sure what I was thinking...
Note issues / limitations of program
Make 24-bit & 16-bit to 8-bit .wav file converter

Squashed commit of the following:

commit 144dc7530464dbb3684fd21b765e729d652b01a0
Author: Zoë Blade <zoe@bytenoise.co.uk>
Date:   Sun Jan 26 18:44:28 2014 +0000

    Add briefest of documentation

commit 5a6fa109022f018f4ad9442ceea6ab3cab5d8671
Author: Zoë Blade <zoe@bytenoise.co.uk>
Date:   Sun Jan 26 18:42:35 2014 +0000

    Success!

    I believe.

commit 1c1c69ecb1c5990eac11e6fc39fc48dd85515e0b
Author: Zoë Blade <zoe@bytenoise.co.uk>
Date:   Sun Jan 26 18:41:33 2014 +0000

    Merge bits of my various other programs together...

commit d62c67a0716a7e038d171fbd1ec0ab23c4eb7b86
Author: Zoë Blade <zoe@bytenoise.co.uk>
Date:   Sun Jan 26 18:35:21 2014 +0000

    Get closer to stated goal

commit 95a3f78850054169c9ad4550d72cd5ca0d781929
Author: Zoë Blade <zoe@bytenoise.co.uk>
Date:   Sun Jan 26 18:27:31 2014 +0000

    Modify program to slowly copy file

    So we've taken away the old wavesplitting point of the program.  Now
    we're ready to add the new bit reducing point to it.

commit cead646efabfc15e6d35c2251d2c9485555d3383
Author: Zoë Blade <zoe@bytenoise.co.uk>
Date:   Sun Jan 26 17:56:39 2014 +0000

    Try using wavesplit as the template for make8bit