Custom Option Pricing Model

[AlexCatarino]

Expected Behavior

Users can define their custom option pricing model.

Actual Behavior

Not supported. We need to select one of the QuantLib models or the "null" model (CurrentPriceOptionPriceModel)

Potential Solution

Create a Python wrapper.
We should review the inputs since one may want to use option and its mirror.

Checklist

• I have completely filled out this template
• I have confirmed that this issue exists on the current master branch
• I have confirmed that this is not a duplicate issue by searching issues