create_double_lift_data: create_double_lift_data
In gm209/gmtools: A collection of generic ML functions for Insurance Risk Modelling

This function creates the requisite data for a double lift chart

1 2	create_double_lift_data(modelA, modelB, actual, weight = NULL, nbins = 10, retLabel = FALSE)

`modelA`	A vector that contains the predictions for Model A - preds will be pro-rated
`modelB`	A vector that contains the predictions for Model B - preds will be pro-rated
`actual`	A vector that contains the actuals that the models are to be compared to
`weight`	A vector that contains the row level weights (exposure,claim count). Defaults to NULL
`nbins`	Passed to the binnarise function - how many equally sized bins should the ratio be cut into
`retLabel`	Keep string labels from binnarise