Dalex

----------------------------------------------------------------
* `ingredients` and `iBreakDown` are added to additional features ([72](https://github.com/pbiecek/DALEX/issues/72)).
* `feature_response()` and `variable_response()` are marked as Deprecated. It is suggested to use `ingredients::partial_dependency()`, `ingredients::accumulated_dependency()` instead ([74](https://github.com/pbiecek/DALEX/issues/74)).
* `variable_importance()` is marked as Deprecated. It is suggested to use `ingredients::feature_importance()` instead ([75](https://github.com/pbiecek/DALEX/issues/75)).
* `prediction_breakdown()` is marked as Deprecated. It is suggested to use `iBreakDown::break_down()` or `iBreakDown::shap()` instead ([76](https://github.com/pbiecek/DALEX/issues/76)).

----------------------------------------------------------------
* updated filenames

----------------------------------------------------------------
* `pdp`, `factorMerger` and `ALEPlot` are going to `Suggested`. ([60](https://github.com/pbiecek/DALEX/issues/60)). In next releases they will be deprecated.
* added `predict` function that calls the `predict_function` hidden in the `explainer` object. ([58](https://github.com/pbiecek/DALEX/issues/58)).

----------------------------------------------------------------
* the `titanic` dataset is copied from `stablelearner` package. Some features are transformed (some `NA` replaced with `0`, more numeric features).

----------------------------------------------------------------
* `DALEX` is being prepared for tighter integration with `iBreakDown` and `ingredients`.
* temporally there is a duplicated `single_variable` and `single_feature`
* Added new `theme_drwhy()`.
* New arguments in the `plot.variable_importance_explainer()`. Namely `bar_width` with widths of bars and `show_baseline` if baseline shall be included in these plots.
* New skin in the `plot.variable_response_explainer()`.
* New skin in the `plot.prediction_breakdown_explainer()`.

----------------------------------------------------------------
* Test datasets are now named `apartments_test` and `HR_test`
* For binary classification we return just a second column. NOTE: this may cause some unexpected problems with code dependend on defaults for DALEX 0.2.6.