FPS/Data.ByteString candidate

Following discussion, I've tagged FPS 0.4, a candidate for the base
library. Changes:

    * Renamed to Data.ByteString(ByteString)
    * Improved documentation
    * Tweaks to build under ghc 6.6
    * Added: getLine, getContents, putStr, putStrLn, zip, unzip, zipWith
    * Much faster: elemIndices, lineIndices, split, replicate
    * More automagic benchmarks and QuickCheck tests.

As usual, code is here: http://www.cse.unsw.edu.au/~dons/fps.html

-- Don