Add "predict_contributions" to Performance and Prediction chapter

Description

adds a "predict_contributions" option for use with GBM and XGBoost only and is not supported for multinomial models.
Add this to the Performance and Prediction chapter in the User Guide.

More info here: https://github.com/h2oai/h2o-3/pull/3378/files

Assignee

Angela Bartz

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Reporter

Angela Bartz

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Major
Configure