Todo:
- Implement real debounce for all buttons
- Add 20 seconds inactive timer to backlight - COMPLETE
- Add dht sensor code (simple)
- Add ability to change requested temp value by pressing arrow up or down. Will add +1 or -1 based on button - COMPLETE
- Add ability to turn mode between cool or heat or off - COMPLETE
- Add ability to turn fan to auto or on - COMPLETE
- Add mqtt support for changing values or reporting modes and temperature
- Connect it to wireless network (simple after switching it to esp8266)