Beta Throttle-Based Torque Converter Lockup Logic 1.3

Improved auto gearbox throttle handling during low aggression shifts, according to the BeamNG.drive 0.18 update.
Improved compatibility(less harsh during shift) with some mods such as the AA80F 8-speed Automatic Transmission.

Tweaked the mathematical function, the "torqueConverterDelayLockupMaxThrottle" is more accurate.

The TC now lockup more gently, using "torqueConverterLockupOutRate":0.5