This is mainly a maintenance release with lots of small bug fixes and performance improvements:

• Fixed a number of small bugs , including discrete time simulations (bnavigator), integer values in state space matrics (don4get), missing zeros on pole/zero plots (Sup3rGeo)

• First cut at a new step_info() function, similar to MATLAB (joaoantoniocardoso)

• Added a new function for dynamically setting gain in sisotool (icam0)

• Anti-stabilizing solutions for Riccati equations are now available (dbacc)

• Printout out state space systems in Jupyter notebooks now formats using LaTeX (alchemyst)

• Additional performance and visualiation improvements: _remove_useless_states (adm78), margins on Bode plots ( icam0), improved damping lines in discrete pzmap (Sup3rGeo)