Fixing MonadIO

[Yitzchak Gale]

Simon Marlow wrote:
>>  The new module
>>  could be provided as Control.Monad.IO.Exception (for example) in the mtl
>>  package... this seems like the smoothest way to address the problem.

Judah Jacobson wrote:
> Of the three possibilities listed by Yitzchak, I'm most in favor of
> adding Brian Hulley's module to the mtl package.  (In particular, I've
> decided that I like it more than my own, earlier proposal.)

The comments in Brian Hulley's module warn that we need to address some
issues raised by Oleg before actually adopting this proposal.
I'll be out for a few days, I'll try to look at it after that if no one else
gets to it.

Thanks,
Yitz