Export lists in modules

[Lennart Augustsson]

John Meacham wrote:
> 
> I mean, even a for loop in haskell is done as
> mapM action [0..10]
> 
> I'd say _most_ uses of lists are deforested away because they are used
> to express control and dataflow and arn't actually used as persistant
> structures. 

Yes, they are optimized away when ghc actually works. :)  At the moment
this seems to be broken (try length[1..n] in 6.4.1).

	-- Lennart