Customisable Characteristic names
Today the names of `CurrentTemperature` and `CurrentRelativeHumidity` Characteristics are hardcoded as "Humidity" and "Temperature". It is possible to change their names in the Home-app but it should be possible to give them initial customised names.

Maybe something like this could be added to the config.json: 
```json
{
  "humidityName": "Humidity",
  "temperatureName": "Temperature"
}
```