A new home for haskell-mode

[Johan Tibell]

Hi all,

After a discussion with Philip Weaver and a few other interested
parties in the community we've moved Philip's repo from
https://github.com/pheaver/haskell-mode to the new official location
at:

    https://github.com/haskell/haskell-mode

You can file bugs/feature requests at:

    https://github.com/haskell/haskell-mode/issues

Hosting the repo under the Haskell GitHub organization gives us a few benefits:

 * It's easier to find. (We'll update all the references out there.)
 * We can add co-maintainers, to offload Philip and make sure pull
requests get merged in a timely manner.
 * The repo doesn't have to move if Philip no longer has time to
maintain haskell-mode some time in the future.

Cheers,
Johan