fix windows post-installation routines with setuptools installed

scripts/ipython_win_post_install.py

@@ -51,6 +51,9 b' def install():'
             
     # Now move onto setting the Start Menu up
     ipybase = pjoin(scripts, 'ipython')
+    if 'setuptools' in sys.modules:
+        # let setuptools take care of the scripts:
+        ipybase = ipybase + '-script.py'
     workdir = "%HOMEDRIVE%%HOMEPATH%"
 
     link = pjoin(ip_start_menu, 'IPython.lnk')

setup.py

@@ -232,8 +232,6 b" if 'setuptools' in sys.modules:"
         test='nose>=0.10.1',
         security='pyOpenSSL>=0.6'
     )
-    # Allow setuptools to handle the scripts
-    scripts = []
 else:
     # If we are running without setuptools, call this function which will
     # check for dependencies an inform the user what is needed.  This is