Use of displayColorInverted
Hi, 

first of all: Thanks for sharing this great Project!

I am running my first tests with a m5stack and so far it looks pretty nice. But right now it is unclear how to use "displayColorInverted". I created a simple test config.json (see below), but the displaycolor is not changing. I am using your precompiled HomePoint v0.04rc1 binary. 

Question:
- do i use the key wrong?

{
  **"displayColorInverted": "true",**
  "wifi": "foo",
  "password": "foo",
  "login": "admin",
  "webpass": "foo",
  "mqttbroker": "foo",
  "mqttusername": "foo",
  "mqttpasswd": "foo",
  "timezone": "CET-1CEST-2,M3.5.0/02:00:00,M10.5.0/03:00:00",
  "scenes": [{
    "name": "Wohnzimmer",
    "type": "Light",
    "icon": "livingroom",
    "devices": [{
      "name": "Side Light",
      "setTopic": "lights/hue/00:17:88:01:02:3c:2a:6d-0b/set/on",
      "getTopic": "hue/status/lights/Hue color lamp 1",
      "onValue": "true",
      "offValue": "false"
    }]
  }]
}

with kind regards and thanks for your support

michael