Keyframes for minimum and maximu value and various fixes.

Lerp at linear speed at end of range
Add configurable lerp linear range parameter.
Add configurable keyframes for minimum and maximum values of the animation.
Support inverted ranges.
Implement keyframe ranging in intake airspeed module.
Change default flow threshold to 0, given the number of people who do Intake Abuse.
More explicit fixed animation states when airspeed is above/below Min/Max value.
Fix Airflow-Airspeed comparison.