[ENHANCEMENT] Configurable HVAC mode state value

[gdouillet]

Hello,

For custom setup, it could be a good idea to allow the configuration of the HVAC mode values.
For instance :

{
    "accessory": "Control4",
    "service": "Thermostat",
    "base_url": "http://XXX.XXX.XXX.XXX:8080/762",
    "switchHandling": "realtime",
    "refresh_interval": 900000,
    "cool_string": "Rafraîchissement_Cool",
    "cool_state": 0,
    "heat_string": "Chauffage_Heat",
    "heat_state": 1,
    "auto_string": "Auto",
    "auto_state": 2,
    "off_string": "Off",
    "off_state": 3,
    "manufacturer": "Control4",
    "model": "Thermostat"
}

[josh-penthera]

I actually have something like this already in place... but on the Control4 driver side. It's not released yet, but it will be soon.