Data.ByteString candidate 3

[Simon Marlow]

Duncan Coutts wrote:

> How would we distinguish a full fixed0width 4-byte Unicode version?

Good point, and that's why using the Data.PackedString hierarchy was 
nice, because it accomodated various different character widths.  I 
quite like

   Data.ByteString
   Data.PackedString.Latin1
   Data.PackedString.UTF8
   Data.PackedString.UCS4
   etc.

(but this is getting a bit bikeshedish, so I'll try to resist the 
temptation to comment any further :-)

Cheers,
	Simon