Support NLP.py optimizer

[Simon Funke]

It would be nice if we had support for the NLP.py optimizer described here:

https://www.researchgate.net/profile/Dominique_Orban/publication/304043573_NLPpy_An_Object-Oriented_Environment_for_Large-Scale_Optimization/links/5764a34908aeb4b99800a321.pdf

The code is available here:

https://github.com/PythonOptimizers/NLP.py