Enhancements

• #179 add need_retrain() method to detect performance decrease
• #226 extract rules from decision tree
• #310 add support for MAPE
• #312 optimize prediction time
• #313 set stacking time threshold depending on best model train time
• #320 search for model with prediction time constraint
• #322 n_jobs as a parameter
• #328 disable stacking for small (nrows < 500) datasets

Bug fixes

• #214 move directory after training
• #246 raise exception when small time limit and no models are trained
• #247 proper display for optimize AUC and R2
• #306 add mix_encoding argument in AutoML constructor
• #308 fix dependencies error in kaggle notebook
• #314 bug fix in hill climbing in Perform mode
• #323 fix catboost bug with tree limit
• #324 #325 bug for feature importance for small data