Install on Windows without using setuptools

This creates batch files, with a .cmd extension, which can launch
IPython from 'ipython' at a command line, to replace the .exe files
created by setuptools.

This makes repeated installations much quicker on Windows.

setup.py

@@ -252,12 +252,6 b" needs_setuptools = set(('develop', 'release', 'bdist_egg', 'bdist_rpm',"
            'bdist', 'bdist_dumb', 'bdist_wininst', 'bdist_wheel',
            'egg_info', 'easy_install', 'upload', 'install_egg_info',
             ))
-if sys.platform == 'win32':
-    # Depend on setuptools for install on *Windows only*
-    # If we get script-installation working without setuptools,
-    # then we can back off, but until then use it.
-    # See Issue #369 on GitHub for more
-    needs_setuptools.add('install')
 
 if len(needs_setuptools.intersection(sys.argv)) > 0:
     import setuptools

setupbase.py

@@ -403,6 +403,16 b' class build_scripts_entrypt(build_scripts):'
             with open(outfile, 'w') as f:
                 f.write(script_src.format(executable=sys.executable,
                                           mod=mod, func=func))
+            
+            if sys.platform == 'win32':
+                # Write .cmd wrappers for Windows so 'ipython' etc. work at the
+                # command line
+                cmd_file = os.path.join(self.build_dir, name + '.cmd')
+                cmd = '@"{python}" "%~dp0\{script}" %*\r\n'.format(
+                        python=sys.executable, script=name)
+                log.info("Writing %s wrapper script" % cmd_file)
+                with open(cmd_file, 'w') as f:
+                    f.write(cmd)
 
         return outfiles, outfiles