Please review: new wiki page with release instructions

[Mikhail Glushenkov]

Hi,

On 19 March 2015 at 17:47, Herbert Valerio Riedel <hvriedel at gmail.com> wrote:
> done (and it still validates):
>
>   http://git.haskell.org/ghc.git/commitdiff/7c132c02436fadaa70674bbfe38b21a67c4fed3a

Great, thanks!