Here you are another small contribution (for the community) -but it feels like a big achievement for me (not a pro here)-.
This library wraps [ipopt](https://coin-or.github.io/Ipopt/). This enables performing large scale non-linear optimization. I have included a couple of examples based on [hs071_c.c](https://github.com/coin-or/Ipopt/blob/master/examples/hs071_c/hs071_c.c). The second example uses a macro to perform a similar calculation [ex02.nim](https://github.com/mantielero/ipopt.nim/blob/master/examples/ex02.nim) which is a lot shorter and kinder to the eyes. I hope it becomes useful for somebody.
