Methods to check the validity of a calibration

[AKuederle]

To check if a calibration is correct, we could implement some helper functions.

I could imagine a "compare" function between to calibrations that checks that two calibrations only deviate by a threshold (this could be used to check calibrations of the same sensor or with higher thresholds calibrations from the same sensor family).

We could also have a function that checks a single calibration for easy assumptions (aka acc-z direction should be similar to uncalibrated by x-deg, the rotation direction of the gyro should be the same as uncalibrated, etc.)

[AKuederle]

@MalteOlle I don't think I will tackle that in the near future, but if you or a student of you want to give it a try I am happy to advice