Haskell Platform call for consensus: add transformers and revise the mtl package to depend on it

[Yitzchak Gale]

Johan Tibell wrote:
> This is a call for consensus for the following proposal:
>    http://trac.haskell.org/haskell-platform/wiki/Proposals/transformers
> Are there any unresolved concerns?

Please create a document (perhaps on the wiki?) with clear
instructions how to resolve any incompatibilities for the upgrade.
Place a link to this document in the package description
that appears on Hackage.

I would recommend also placing a link to this document
in the Haddock module comment for each affected module.

Thanks,
Yitz