patch applied (packages/base): Merge in changes from fps head. Highlights:

[Don Stewart]

Wed May 24 23:50:12 PDT 2006  Don Stewart <dons at cse.unsw.edu.au>
  * Merge in changes from fps head. Highlights:
  
      Wed May 24 15:49:38 EST 2006  sjanssen at cse.unl.edu
        * instance Monoid ByteString
  
      Wed May 24 15:04:04 EST 2006  Duncan Coutts <duncan.coutts at worc.ox.ac.uk>
        * Rearange export lists for the .Char8 modules
  
      Wed May 24 14:59:56 EST 2006  Duncan Coutts <duncan.coutts at worc.ox.ac.uk>
        * Implement mapAccumL and reimplement mapIndexed using loopU
  
      Wed May 24 14:47:32 EST 2006  Duncan Coutts <duncan.coutts at worc.ox.ac.uk>
        * Change the implementation of the unfoldr(N) functions.
        Use a more compact implementation for unfoldrN and change it's behaviour
        to only return Just in the case that it actually 'overflowed' the N, so
        the boundary case of unfolding exactly N gives Nothing.
        Implement unfoldr and Lazy.unfoldr in terms of unfoldrN. Use fibonacci
        growth for the chunk size in unfoldr
  
      Wed May 24 08:32:29 EST 2006  sjanssen at cse.unl.edu
        * Add unfoldr to ByteString and .Char8
        A preliminary implementation of unfoldr.
  
      Wed May 24 01:39:41 EST 2006  Duncan Coutts <duncan.coutts at worc.ox.ac.uk>
        * Reorder the export lists to better match the Data.List api
  
      Tue May 23 14:04:32 EST 2006  Don Stewart <dons at cse.unsw.edu.au>
        * pack{Byte,Char} -> singleton. As per fptools convention
  
      Tue May 23 14:00:51 EST 2006  Don Stewart <dons at cse.unsw.edu.au>
        * elemIndexLast -> elemIndexEnd
  
      Tue May 23 13:57:34 EST 2006  Don Stewart <dons at cse.unsw.edu.au>
        * In the search for a more orthogonal api, we kill breakFirst/breakLast,
          which were of dubious value
  
      Tue May 23 12:24:09 EST 2006  Don Stewart <dons at cse.unsw.edu.au>
        * Abolish elems. It's name implied it was unpack, but its type didn't. it made no sense
  
      Tue May 23 10:42:09 EST 2006  Duncan Coutts <duncan.coutts at worc.ox.ac.uk>
        * Minor doc tidyup. Use haddock markup better.
  
      Tue May 23 11:00:31 EST 2006  Don Stewart <dons at cse.unsw.edu.au>
        * Simplify the join() implementation. Spotted by Duncan.
  

    M ./Data/ByteString.hs -152 +138
    M ./Data/ByteString/Char8.hs -110 +84