Windows Night Light Support

[raulnor516]

Love this improvement of Prismatic, I can finally stop using AmbiBox! I see that Flux support is included, is there a way of supporting the Windows 10 built in Night Light?

[psieg]

The windows night light works differently than f.lux.

If you can tell me how I can figure out it's state via API, I'll take a look.

There seems to be a registry key, but how to get the state from those binary values?
https://stackoverflow.com/questions/43340619/get-status-of-night-light-mode-in-windows-10
(Night Light does not use the gamma ramp described in the post, which is what the current f.lux feature uses)