added a small script as a stub for a config wizard

this doesn't implement any config wizard ui, but does a simple http fetch of 
root_cap and introducer.furl from a php backend stub.

windows/confwiz.py

@@ -0,0 +1,46 @@
+
+import urllib2
+from urllib import urlencode
+
+from allmydata.util.assertutil import precondition
+from allmydata import uri
+
+class AuthError(Exception):
+    pass
+
+def unicode_to_utf8(uobj):
+    assert precondition(isinstance(uobj, unicode))
+    return uobj.encode('utf-8')
+
+def post(url, args):
+    argstr = urlencode(args)
+    conn = urllib2.urlopen(url, argstr)
+    return conn.read()
+
+def get_root_cap(url, user, passwd):
+    args = {
+        'action': 'authenticate',
+        'email': unicode_to_utf8(user),
+        'passwd': unicode_to_utf8(passwd),
+        }
+    root_cap = post(url, args)
+    if root_cap == '0':
+        raise AuthError()
+    elif not uri.is_uri(root_cap):
+        raise ValueError('%r is not a URI' % (root_cap,))
+    else:
+        return root_cap
+
+def get_introducer_furl(url):
+    return post(url, { 'action': 'getintroducerfurl' })
+
+def main():
+
+    URL = 'https://www-test.allmydata.com/native_client2.php'
+
+    print get_introducer_furl(URL)
+    print get_root_cap(URL, u'user', u'pass')
+
+
+if __name__ == '__main__':
+    main()