-`discretionary_policy` is now able to solve nonlinear models (it will then use their first-order approximation, and the analytical steady state must be provided) (!1792)
-`evaluate_planner_objective` now works with 2nd order approximation (!1828)
- Option `block` of `model` can now be used in conjunction with `use_dll`
- New non-linear least squares optimizer based on `lsqnonlin` for computing the mode (available under `mode_compute=13`)