Issue with initializing accessory
Good Day,

After some reinstalls of homebridge I was able to get your plugin installed. However, I seems to be getting the following error when running home bridge with your accessory sample:

```
[11/12/2016, 11:37:05 PM] ---
[11/12/2016, 11:37:05 PM] Loaded config.json with 1 accessories and 0 platforms.
[11/12/2016, 11:37:05 PM] ---
[11/12/2016, 11:37:05 PM] Loading 1 accessories...
[11/12/2016, 11:37:05 PM] [Arduino 101] Initializing BLE Accessory accessory...
/usr/local/lib/node_modules/homebridge-bluetooth/index.js:18
  this.lights.service = trim_uuid(config.lights.service);
                                               ^
TypeError: Cannot read property 'service' of undefined
    at new BLEAccessory (/usr/local/lib/node_modules/homebridge-bluetooth/index.js:18:48)
    at Server._loadAccessories (/usr/local/lib/node_modules/homebridge/lib/server.js:262:29)
    at Server.run (/usr/local/lib/node_modules/homebridge/lib/server.js:78:38)
    at module.exports (/usr/local/lib/node_modules/homebridge/lib/cli.js:40:10)
    at Object.<anonymous> (/usr/local/lib/node_modules/homebridge/bin/homebridge:17:22)
    at Module._compile (module.js:570:32)
    at Object.Module._extensions..js (module.js:579:10)
    at Module.load (module.js:487:32)
    at tryModuleLoad (module.js:446:12)
```

Any thoughts?