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/OpenGL/2.2.3.0.nix

@@ -2,8 +2,8 @@
 
 cabal.mkDerivation (self : {
   pname = "OpenGL";
-  version = "2.2.3.0"; # Haskell Platform 2010.1.0.0 and 2010.2.0.0
-  sha256 = "a75c3277bb20fda9a4ac1eb0e838fe4b5baf92f5539466b92bd255626afb0502";
+  version = "2.2.3.0"; # Haskell Platform 2010.1.0.0, 2010.2.0.0, 2011.2.0.0
+  sha256 = "00h5zdm64mfj5fwnd52kyn9aynsbzqwfic0ymjjakz90pdvk4p57";
   propagatedBuildInputs = [mesa libX11];
   meta = {
     description = "A binding for the OpenGL graphics system";