Gear, motor and spring damper tweaks

This updated build brings increased motor torque and spring damper values, which should work better with larger, heavier constructions.  It does mean however that you will probably have to tweak the spring damper settings in your existing constructions, as well as perhaps remove some motors if you’re currently doubling them up to increase torque.

I have also made some tweaks to reduce gear slip under high torque loads (in fact this is what allowed me to increase the motor torque).

This build also has a bunch of bug fixes (see the release notes for all the details), but one fix in particular affects motors.  Depending on what order motors and axles were attached together, the motor rotation direction could be different.  This has now been fixed so that the direction is always consistent, but it does mean that you may have to flip the reverse direction toggle in your existing constructions.