darcs patch: Add UTF8 converting and outputing functions

[Jun Mukai]

Hello Ian,


> Why is all this GHC-only?
> If the earlier stuff really does need to be GHC-only, shouldn't this be
> too?

I agree with you.  There are no needs to be GHC-only.

However, my code imports GHC.List and GHC.Word (not Data.List and
Data.Word because they import Data.Char).  These requirements are
implementation dependent.  I have little knowledge about other
implementation; I do not know the appropriate module names for NHC or
Hugs or other implementations.  I have no testing environments for
them.

And also, the problem of UTF-8 encoding is currently GHC specific,
IMHO.  I'd like to solve this at first.  I intend to discuss whether
UTF-8 code is included in base or not.  
The restrictions can be lately released, if needed.


Thanks

Jun Mukai
mukai at jmuk.org