Can I create and registry a gym environment by F16 aircraft?

[desires19]

Thanks for your excellent work. We want to floow your code on our new work, but we found there are just three aircraft mode in your project.https://github.com/Gor-Ren/gym-jsbsim/blob/master/gym_jsbsim/aircraft.py. Can we create and registry a gym environment by F16 aircraft like f15 and a320? Good luck with your work and all the best！

[sryu1]

Hi, I've added F-16 support here: https://github.com/sryu1/jsbgym :)