GitLab

* Add lgb.prepare

* Update roxygen to 6.0.1 and add lgb.prepare

* Add prepared rules.

* Add recommendation when needing rules for transformation.

* Define environment in examples (xgboost clash)

* Large R code changes

* Update lgb.Booster.R

* Add saveRDS (manual)

* Add documentation

* Change arguments passed from debug.

* Add readRDS, change way of saving.

* Change documentation.

* Add better documentation.