Display results using inverse logit function

[rwilleynyc]

I find this library to be incredibly useful, though I would like to know if there are ways to customize the pdp_plot a bit more. Specifically, I would like to be able to:

1. Display the values on the distribution of data points as percentages.
2. Adjust the results using the inverse logit function so that the values are on a 0 to 1 scale rather than -1 to 1 scale. This would allow the ability to interpret results as more of a probability, which is easier for non-technical stakeholders to understand.

I don't see a way to do either of these at present, but it would be incredibly helpful to have these as optional arguments.