display message if wininst is run without setuptools

scripts/ipython_win_post_install.py

@@ -37,6 +37,8 b' def install():'
     if not have_setuptools:
         # This currently doesn't work without setuptools,
         # so don't bother making broken links
+        print("Distribute (setuptools) is required to create Start Menu items.", file=sys.stderr)
+        print("Re-run this installer after installing distribute to get Start Menu items.", file=sys.stderr)
         return
     
     # Lookup path to common startmenu ...