Updated Shiftlogic Automatic Transmissions 4.31

Added a brand new transmission logic: Single clutch (automated manual) gearbox.

Features:
Idle Creep, use a small amount of brake to disengage the clutch.(use the EngineInfo UI app)
Realistic(somewhat) clutch and shifting time, no torque is transferred during shifts.
Coast throttle (upshift) and rev-match throttle (downshift).
Clutch engagement RPM based on throttle value, for initial acceleration.
Jbeam adjustable parameters.

Transmission list:
800-Series, K-Series: 7SCT(081010M2)
SBR4: 6SCT(102015M2)
T-Series: 11SCT(070204M4), 10SCT(070204M3), 12SCT(070204M4)
Sunburst: 6SCT(102015M2)
FCV: 5SCT(100510M2)

*Note: Some transmissions are just for fun (not historically correct, etc)

Bugfix: Fixed the 6AT shifting between 4th and 5th on the Sunburst and DT40L. Remedied engine overrev during steep downhill.