KINSOL vs MINPACK vs NLsolve Benchmarking

[ChrisRackauckas]

There's 3 separate nonlinear solver packages now:

https://github.com/JuliaDiffEq/Sundials.j (KINSOL) https://github.com/sglyon/MINPACK.jl

and this. It would be interesting to have a set of benchmarks showing the effectiveness of each.

[sglyon]

At some point we talked about having a package that holds all the test cases.

An "easy" first step at this would be to consolidate all tests into a single package that all of them can use and then use that as a suite of benchmarks too