The WebSocketServer is almost back online.  I lost the hdd on my linux box a month or two ago.  The drive seized up and I lost everything on the drive, including my Minecraft dev server.  Recently I've had the time to reinstall Linux, setup Minecraft, and get the WebSocketServer plugin back in place.  Due to the upgrade to Spigot-1.8, I've had to update the WebSocketServer plugin & client-side library, but have not pushed the client-side update to "production," so while the demo page now loads, the data that is returned is not shown.  I hope to have this updated soon.