Fix SubtypeName breakage.

Keen's (old) gyro API was changed from rad/s to RPM. Adapt internal API accordingly.

Fix breakage with 1.185.8.

No longer needs a timer block for its PB.

Fix breakage due to center of mass switching from Vector3D to Vector3I in "stable." Thanks, Keen!

Updated the cruise control module. Now accepts "cruise reverse"

Note that the "stop" command no longer works. Use "cruise reverse" instead, it does the exact same thing.

Fix any/all usage of deprecated & obsolete API as of 01.172.

Note that the script's "reference point" is now the ship's center of mass.

Use different max gyro error for both reverse thrust and emergency stop.

If your ship takes a while to re-engage thrusters when doing a reverse thrust (or maybe doesn't re-engage them at all), try increasing REVERSE_THRUST_MAX_GYRO_ERROR a bit.

Minor PID rework to apply the things I've learned in From the Depths. Re-tuned gyro & thruster PIDs.

Fixed for IMyBlockGroup changes.