Calibration returns extrinsic translation in meters instead of millimeters

[cansik]

It appears that the translation returned by get_extrinsic_parameters(...) is provided in meters, which seems unusual given that the depth data is in millimeters. This discrepancy can cause problems when using this information for custom depth-to-point-cloud conversions (outside of the k4a framework). What was the rationale behind returning the values in meters?

https://github.com/etiennedub/pyk4a/blob/master/pyk4a/calibration.py#L211

I assume that changing this behavior might cause applications to no longer function as expected. However, it should at least be explicitly mentioned in the method's documentation.