Note that the demo is somewhat old; I do not know if it has park implemented. You'll want to build it from GitHub, which we've made relatively straightforward.

Note that the demo is somewhat old; I do not know if it has park implemented. You'll want to build it from GitHub, which we've made relatively straightforward. We are planning to update the demo (and perhaps post on HN) once I fix some IE issues (since we strive to be compatible with IE9).