Need a cwipc_record utility.

[jackjansen]

This should do a raw recording of realsense or Kinect streams.
It should read and parse the cameraconfig.json file, and add the record_to_directory field.
After recording, it should create the cameraconfig.json for the recording.
It should probably also find the correct playback_inpoint_micros value for each camera.
It could probably do a sanity check of the recording.
Maybe it can print warning messages if during recording it detects that there are missing frames.