This allows the data to be safely shared and passed around, even allowing us
to tag frames with the data and passed around that way instead.
Since it now can be passed around more safely make the prober call the save
function instead of the calibration code. This then forms a basis for further
work where we can hook this up into a more proper configuration file.
Removes the "raw" data structures for camera calibration, not needed.
The only thing they contained beyond the revised regular structures
was derived data that the consumer might parameterize differently.
Renames t_settings_stereo to t_stereo_camera_calibration.
The calibration info is data (that could be stored on the device, etc),
not settings.