Move defined values to a common header file

[timsp]

In order to more easily have the rPi do the same sanity checks on values as the Arduino does, we will move all compile-time definition of minimum, maximum, setpoints, etc to a common header file in the Arduino code such that the rPi python code can parse this data and implement all the same limits.

[davidsean]

once RPi parses this, it can be closed