Activities triggered by Harmony remote not showing in Homebridge or Home.app
Since updating to the latest version (0.1.2) activities triggered via the Harmony remote no longer show in the Homebridge log and are not changing state in Home.app. I triggered several activities via the remote and none showed in either place.

Activities triggered in Home.app DO show in the Homebridge log and update their state correctly in Home.app

Getting some errors in the log too but it's not entirely clear when they are triggered. Seemingly when I triggered an activity in the Home.app but not every time.

```
0|homebridge  | ReferenceError: callback is not defined
0|homebridge  |     at Timeout._onTimeout (/usr/lib/node_modules/homebridge-harmony/index.js:425:47)
0|homebridge  |     at listOnTimeout (timers.js:324:15)
0|homebridge  |     at processTimers (timers.js:268:5)
```

Also nothing except sometimes this deprecation warning on startup or maybe when triggering with the remote.
```
0|homebridge  | (node:16430) [DEP0112] DeprecationWarning: Socket.prototype._handle is deprecated
```