Refactored this to be a touch more like Neos' official implementation of eye tracking for better maintainability
Made smoothing use a Lerp rather than a SmoothLerp (makes blinking seem a good deal more natural I've noticed)
Added support for a config file to change/update settings without needing to recompile the mod (written to and loaded from nml_config/varjo.neos.eyetracking.json)
Added some missing methods and a touch of filtering for when tracking may have some hiccups