xmaww

@AntKirill @fipeop The problem of multiple objective external function optimization also bothered me a long time，I found two basic tutorial here: ①https://nbviewer.org/github/SheffieldML/GPyOpt/blob/devel/manual/GPyOpt_external_objective_evaluation.ipynb ②https://github.com/fmfn/BayesianOptimization/blob/master/examples/advanced-tour.ipynb but both of them are single objective...