There are some errors raised when I run it following the readme.

[jane00]

Traceback (most recent call last):
File "/Users/admin/Documents/google-cloud-sdk/platform/google_appengine/lib/cherrypy/cherrypy/wsgiserver/wsgiserver2.py", line 1302, in communicate
req.respond()
File "/Users/admin/Documents/google-cloud-sdk/platform/google_appengine/lib/cherrypy/cherrypy/wsgiserver/wsgiserver2.py", line 831, in respond
self.server.gateway(self).respond()
File "/Users/admin/Documents/google-cloud-sdk/platform/google_appengine/lib/cherrypy/cherrypy/wsgiserver/wsgiserver2.py", line 2115, in respond
response = self.req.server.wsgi_app(self.env, self.start_response)
File "/Users/admin/Documents/google-cloud-sdk/platform/google_appengine/google/appengine/tools/devappserver2/wsgi_server.py", line 292, in call
return app(environ, start_response)
File "/Users/admin/Documents/google-cloud-sdk/platform/google_appengine/google/appengine/tools/devappserver2/request_rewriter.py", line 314, in _rewriter_middleware
response_body = iter(application(environ, wrapped_start_response))
File "/Users/admin/Documents/google-cloud-sdk/platform/google_appengine/google/appengine/tools/devappserver2/python/runtime/request_handler.py", line 165, in call
self._flush_logs(response.get('logs', []))
File "/Users/admin/Documents/google-cloud-sdk/platform/google_appengine/google/appengine/tools/devappserver2/python/runtime/request_handler.py", line 308, in _flush_logs
apiproxy_stub_map.MakeSyncCall('logservice', 'Flush', request, response)
File "/Users/admin/Documents/google-cloud-sdk/platform/google_appengine/google/appengine/api/apiproxy_stub_map.py", line 97, in MakeSyncCall
return stubmap.MakeSyncCall(service, call, request, response)
File "/Users/admin/Documents/google-cloud-sdk/platform/google_appengine/google/appengine/api/apiproxy_stub_map.py", line 331, in MakeSyncCall
rpc.CheckSuccess()
File "/Users/admin/Documents/google-cloud-sdk/platform/google_appengine/google/appengine/api/apiproxy_rpc.py", line 136, in CheckSuccess
self._traceback)
File "/Users/admin/Documents/google-cloud-sdk/platform/google_appengine/google/appengine/api/apiproxy_rpc.py", line 161, in _WaitImpl
self.request, self.response)
File "/Users/admin/Documents/google-cloud-sdk/platform/google_appengine/google/appengine/ext/remote_api/remote_api_stub.py", line 223, in MakeSyncCall
self._MakeRealSyncCall(service, call, request, response)
File "/Users/admin/Documents/google-cloud-sdk/platform/google_appengine/google/appengine/ext/remote_api/remote_api_stub.py", line 248, in _MakeRealSyncCall
encoded_response = self._server.Send(self._path, encoded_request)
File "/Users/admin/Documents/google-cloud-sdk/platform/google_appengine/google/appengine/tools/appengine_rpc.py", line 469, in Send
f = self.opener.open(req)
File "/System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/urllib2.py", line 437, in open
response = meth(req, response)
File "/System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/urllib2.py", line 550, in http_response
'http', request, response, code, msg, hdrs)
File "/System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/urllib2.py", line 475, in error
return self._call_chain(*args)
File "/System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/urllib2.py", line 409, in _call_chain
result = func(*args)
File "/System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/urllib2.py", line 558, in http_error_default
raise HTTPError(req.get_full_url(), code, msg, hdrs, fp)
HTTPError: HTTP Error 503: Service Unavailable

[jane00]

OK, the answer is bellow.
https://stackoverflow.com/questions/16698621/google-app-engine-error-httperror/19460147#19460147