Add show_values option to feature importances plot (#2351)
Add show_values option to feature importances plot (#2351)

Adding an option to remove the values from the features importances plot in Python.
dmlc/xgboost,dmlc/xgboost,dmlc/xgboost,dmlc/xgboost,dmlc/xgboost,dmlc/xgboost