Small Update 1.51

Stopped using reserved2 layer (planes falling through floor)
SaccFlight menu started (Rename layers option)
AGMs can lock moving targets
Added splash effect for missiles hitting water
'Throw' variable to give missiles initial launch speed
Syncscript improvement (less jerky when watching someone crash/enter catapult)
Syncscript now has a proper 'slow mode' that smooths properly
Hoverbike stops hovering when out of fuel
Added 'dead' bool to animators
Stopped 'pitchdown' related physics from effecting yaw
SS-1 (boat) now sinks with physics rather than animation
All vehicles move their pivots to CoM on start, to improve rotation sync