Upgrading from Platform to Accessory

Since version 0.5 the plugin registers itself as a Platform rather than an Accessory. This means a couple of tweaks are required to the .homebridge/config.json file.

1. Move the existing configuration relating to the people accessory from the accessory array into the platform array (you may need to create the platform array if you don't have any platforms already.
2. Change "accessory": "people" to "platform": "People"
3. (Optional) You may wish to make use of the new configuration options now available. These can be seen at https://github.com/PeteLawrence/homebridge-people/blob/master/README.md#configuration