mkdirp issue!
Hi,
I have some issue installing your plugin, I'm getting the following error:

```
Apr 27 17:50:09 raspberrypi homebridge[30913]: [4/27/2017, 5:50:09 PM] ERROR LOADING PLUGIN homebridge-broadlink-rm:
Apr 27 17:50:09 raspberrypi homebridge[30913]: [4/27/2017, 5:50:09 PM] Error: EACCES: permission denied, mkdir '/home/homebridge'
Apr 27 17:50:09 raspberrypi homebridge[30913]: at Object.fs.mkdirSync (fs.js:895:18)
Apr 27 17:50:09 raspberrypi homebridge[30913]: at sync (/usr/lib/node_modules/homebridge-broadlink-rm/node_modules/mkdirp/index.js:71:13)
Apr 27 17:50:09 raspberrypi homebridge[30913]: at sync (/usr/lib/node_modules/homebridge-broadlink-rm/node_modules/mkdirp/index.js:77:24)
Apr 27 17:50:09 raspberrypi homebridge[30913]: at sync (/usr/lib/node_modules/homebridge-broadlink-rm/node_modules/mkdirp/index.js:77:24)
Apr 27 17:50:09 raspberrypi homebridge[30913]: at Function.sync (/usr/lib/node_modules/homebridge-broadlink-rm/node_modules/mkdirp/index.js:77:24)
Apr 27 17:50:09 raspberrypi homebridge[30913]: at LocalStorage.parseStorageDirSync (/usr/lib/node_modules/homebridge-broadlink-rm/node_modules/node-persist/src/local-storage.js:600:20)
Apr 27 17:50:09 raspberrypi homebridge[30913]: at LocalStorage.initSync (/usr/lib/node_modules/homebridge-broadlink-rm/node_modules/node-persist/src/local-storage.js:141:14)
Apr 27 17:50:09 raspberrypi homebridge[30913]: at Object.nodePersist.initSync (/usr/lib/node_modules/homebridge-broadlink-rm/node_modules/node-persist/src/node-persist.js:37:32)
Apr 27 17:50:09 raspberrypi homebridge[30913]: at Object.<anonymous> (/usr/lib/node_modules/homebridge-broadlink-rm/helpers/persistentState.js:7:13)
Apr 27 17:50:09 raspberrypi homebridge[30913]: at Module._compile (module.js:571:32)
```

I looked at issue #60 and installed your latest release but i can't get ahead of this.
maybe it's necessary for you to know, I'm using damien to load homebridge on boot and my config and persist folders are at `/var/homebridge/` and not `/home/homebridge` like it's trying to access.

Please help!