patch applied (packages/Cabal): document all the language extensions

[Ian Lynagh]

Thu Apr  8 23:05:59 PDT 2010  mcallister.keegan at gmail.com
  * document all the language extensions
  Resolves ticket #344.

    M ./Language/Haskell/Extension.hs -7 +191

View patch online:
http://darcs.haskell.org/cgi-bin/darcsweb.cgi?r=packages/Cabal;a=darcs_commitdiff;h=20100409060559-b057a-c108b2cc51b9f61fb9397ee7bcdbde8c04c715fd.gz