Copy branin to danilosine
Code Danilo's sine function
Accept models with only one parameter
Allow to plot the predictive distribution of the observations
Add back hyperparameter tuning in plot function

This is needed when working on evaluation results for which
the hyperparameters are not known, either because the file was
deleted, or because those datapoints have been manually chosen
or evaluated by another software than spearmint.
Merge branch 'SinExp' into plot