calibrate_frd.py: import cv2 later to enable sai-cli -h when cv2 is n…

…ot installed

Add barometer temperature checks to sai-cli diagnose (#88)

* Add barometer temperature checks to sai-cli diagnose

* Adjust temperature thresholds

* Improve barometer warning messages a little

* Add barometer altitude plot to sai-cli diagnose (#90)

Fix FRD calibration imuForward vector

Add FrontRightDown calibration tool (#86)

* Add FrontRightDown calibration tool

Fix missing cameras error

Show SDK version using sai-cli -h (#82)

Show SDK version using sai-cli -h (#82)

Diagnose detects discarded frames

sai-cli diagnose: Plot vio outputs if they are available

sai-cli diagnose: Plot vio outputs if they are available