gaitmap.utils.coordinate_conversion: Convert axes from sensor frame to body frame

A set of helper functions for the conversion of accelerometer and gyroscope data from the sensor to the body frame.

Definitions can be found in the Coordinate Systems guide.

Functions

convert_left_foot_to_fbf(data)	Convert the axes from the left foot sensor frame to the foot body frame (FBF).
convert_right_foot_to_fbf(data)	Convert the axes from the right foot sensor frame to the foot body frame (FBF).
convert_to_fbf(data[, left, right, ...])	Convert the axes from the sensor frame to the body frame for one MultiSensorDataset.