- 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/zope/zope_python-2.4.4.patch

@@ -1,12 +0,0 @@
-diff -r 8833d4892dfc Zope-3.2.1/configure
---- a/configure	Mon Aug 18 14:55:39 2008 +0200
-+++ b/configure	Mon Aug 18 14:57:39 2008 +0200
-@@ -21,7 +21,7 @@ prefix="$DEFAULT_PREFIX"
- 
- # Place the optimal target version number (as returned by sys.version)
- # below
--TARGET="2.4.2"
-+TARGET="2.4.4"
- 
- # Order a list of "acceptable" python version numbers (as returned by
- # sys.version) below in "best" to "worst" order, not including the