Add post_install script to create start menu entries in Python 3.

setup3.py

@@ -1,4 +1,5 b''
 import os.path
+import sys
 from setuptools import setup
 from setuptools.command.build_py import build_py
 
@@ -14,6 +15,20 b" setup_args['packages'] = find_packages()"
 setup_args['package_data'] = find_package_data()
 setup_args['cmdclass'] = {'build_py': record_commit_info('IPython', build_cmd=build_py)}
 
+# Script to be run by the windows binary installer after the default setup
+# routine, to add shortcuts and similar windows-only things.  Windows
+# post-install scripts MUST reside in the scripts/ dir, otherwise distutils
+# doesn't find them.
+if 'bdist_wininst' in sys.argv:
+    if len(sys.argv) > 2 and \
+           ('sdist' in sys.argv or 'bdist_rpm' in sys.argv):
+        print >> sys.stderr, "ERROR: bdist_wininst must be run alone. Exiting."
+        sys.exit(1)
+    setup_args['scripts'] = [os.path.join('scripts','ipython_win_post_install.py')]
+    setup_args['options'] = {"bdist_wininst":
+                             {"install_script":
+                              "ipython_win_post_install.py"}}
+
 def main():
     setup(use_2to3 = True, **setup_args)