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/GLUT/2.1.2.1.nix

@@ -2,8 +2,8 @@
 
 cabal.mkDerivation (self : {
   pname = "GLUT";
-  version = "2.1.2.1"; # Haskell Platform 2010.1.0.0 and 2010.2.0.0
-  sha256 = "0230bfacbfb85c126f1fba45fcd8d02f20da9ee19180b5ada698224362d17264";
+  version = "2.1.2.1"; # Haskell Platform 2010.1.0.0, 2010.2.0.0, 2011.2.0.0
+  sha256 = "0r3js5i468lqlsnvb04iw6gdl81gs3cgqids3xpi4p5qpynbyc02";
   propagatedBuildInputs = [OpenGL glut libSM libICE libXmu libXi mesa];
   meta = {
     description = "A binding for the OpenGL Utility Toolkit";