lpoly_sde: LPoly System Implicit SDE Simulator using NLOPT
In rossklin/SimpleSDESampler: Simple SDE Sampler

Simulates a trajectory to the SDE specified by *sys* and the noise level sigma, starting at the point start and integrating over times [*from*,*to*] on *steps + 1* time points.

1 2	lpoly_sde(sys, sigma, start, from, to, steps, x_tol = 0, algorithm = "LBFGS")

`sys`	lpoly_system_type XPtr object created with lpoly_make_system
`sigma`	Amplitude of noise: scalar
`start`	Initial position: n vector
`from`	Initial time: scalar
`to`	Final time: scalar
`steps`	Number of points to take, s.t. dt = (from - to) / (steps + 1): integer