Added InterpolateDerivative on intermediate portions of curve
Added InterpolateDerivative on intermediate portions of curve

krishauser/Klampt,hpbader42/Klampt,arocchi/Klampt,arocchi/Klampt,krishauser/Klampt,hpbader42/Klampt,YilunZhou/Klampt,krishauser/Klampt,stevekuznetsov/Klampt,hpbader42/Klampt,krishauser/Klampt,arocchi/Klampt,krishauser/Klampt,YilunZhou/Klampt,YilunZhou/Klampt,stevekuznetsov/Klampt,krishauser/Klampt,stevekuznetsov/Klampt,bbgw/Klampt,arocchi/Klampt,stevekuznetsov/Klampt,bbgw/Klampt,bbgw/Klampt,bbgw/Klampt,YilunZhou/Klampt,hpbader42/Klampt,hpbader42/Klampt