Make installation with Python 3 possible.

setup3.py

@@ -0,0 +1,9 b''
+import os.path
+from setuptools import setup
+
+from setupbase import (setup_args, find_scripts, find_packages)
+    
+setup_args['entry_points'] = find_scripts(True)
+setup_args['packages'] = find_packages()
+
+setup(use_2to3 = True, **setup_args)

setupbase.py

@@ -23,7 +23,10 b' from __future__ import print_function'
 import os
 import sys
 
-from ConfigParser import ConfigParser
+try:
+    from configparser import ConfigParser
+except:
+    from ConfigParser import ConfigParser
 from distutils.command.build_py import build_py
 from glob import glob
 
@@ -40,6 +43,13 b' pjoin = os.path.join'
 def oscmd(s):
     print(">", s)
     os.system(s)
+    
+try:
+    execfile
+except NameError:
+    def execfile(fname, globs, locs=None):
+        locs = locs or globs
+        exec(compile(open(fname).read(), fname, "exec"), globs, locs)
 
 # A little utility we'll need below, since glob() does NOT allow you to do
 # exclusion on multiple endings!
@@ -58,7 +68,7 b' def file_doesnt_endwith(test,endings):'
 #---------------------------------------------------------------------------
 
 # release.py contains version, authors, license, url, keywords, etc.
-execfile(pjoin('IPython','core','release.py'))
+execfile(pjoin('IPython','core','release.py'), globals())
 
 # Create a dict with the basic information
 # This dict is eventually passed to setup after additional keys are added.

setupext/__init__.py

@@ -1,3 +1,3 b''
 # load extended setup modules for distuils
 
-from install_data_ext import install_data_ext
+from .install_data_ext import install_data_ext