add a demo that benchmarks 2 R optimizers and shows postproc

[berndbischl]

we need to decide where to put this.

vignette might be best

[jakobbossek]

Agree

[berndbischl]

i have begun here

bechmark_demo.R (in main dir)

the plots look a bit strange (just 1 algo visible?)
and i am getting some warning in postproc call

too tired now. over and out

[jakobbossek]

Yes I experienced the same behaviour of the postprocessing. Going to have look at this later.

[jakobbossek]

We need to call python -m cocopp result_folder/algo1 result_folder/algo2 ... result_folder/algon now in order to generate comparisson data.

[jakobbossek]

Added a first draft of the vignette (not finished).