Major Haskell packages overhaul.

Several changes, some highlights:

  * Structure of haskell-packages.nix updated. It's now easier to
    select different default versions of packages for different
    versions of GHC.

  * GHC 7.0.2 is now default.

  * Haskell Platform 2011.2.0.0 has been added and is now default.

  * Several packages have been updated
    (gtk2hs, gitit, xmonad, darcs, ...).

  * Some old packages have been removed.

svn path=/nixpkgs/trunk/; revision=26288

pkgs/development/libraries/haskell/haskell-src/1.0.1.4.nix

@@ -0,0 +1,13 @@
+{cabal, happy, syb}:
+
+cabal.mkDerivation (self : {
+  pname = "haskell-src";
+  version = "1.0.1.4"; # Haskell Platform 2011.2.0.0
+  sha256 = "02h33d7970641p9vi62sgcxb5v4yaz8xx9vf2yxyvxs3hglm7f0j";
+  extraBuildInputs = [happy];
+  propagatedBuildInputs = [syb];
+  meta = {
+    description = "Manipulating Haskell source code";
+  };
+})  
+