Request to reference MPPI with OpenAI Gym implementation in your docs

[ferreirafabio]

Hi,

I've implemented Model Predictive Path Integral (MPPI, Williams et al., 2017) in Python with the OpenAI Gym environment "pendulum" [1]. Perhaps you are interested in referencing this implementation in your readme/docs? I believe sharing this information could help some people looking for MPPI implementations.

It would be greatly appreciated.

[1] https://github.com/ferreirafabio/mppi_pendulum

[ferreirafabio]

@bgoldfai