I'd love to try this out, but it seems that it uses some luarocks that are unavailable (sundown, cwrap) .. or .. at least, my attempt to do a standard install with the instructions as given has resulted in luarocks not finding any of the required rocks .. anyone know what might be causing this?

(EDIT: Never mind I figured it out - if you have a luarocks installed previously, you must do:

    $ mv /usr/local/etc/luarocks/config-5.1.lua /usr/local/etc/luarocks/config-5.1-old.lua
    $ mv /usr/local/etc/luarocks/config.lua /usr/local/etc/luarocks/config-5.1.lua