- adding experimental python31 build

- cleanup python libraries:
 * moving all python libraries into a attr set into a directory
   so that expressions can be used for both: python 2.5 and 2.6 easily
 * disabling packages which don't build

svn path=/nixpkgs/trunk/; revision=21142

pkgs/development/python-modules/pycairo/default.nix

@@ -1,11 +0,0 @@
-{stdenv, fetchurl, python, pkgconfig, cairo, x11}:
-
-stdenv.mkDerivation {
-  name = "pycairo-1.8.8";
-  src = fetchurl {
-    url = http://cairographics.org/releases/pycairo-1.8.8.tar.gz;
-    sha256 = "0q18hd4ai4raljlvd76ylgi30kxpr2qq83ka6gzwh0ya8fcmjlig";
-  };
-
-  buildInputs = [python pkgconfig cairo x11];
-}