Extract line work from Parcels

[AdammReilly]

I want to utilize the existing Parcel base object and add some extensions that allow extracting the line work for down stream work flows.

[AdammReilly]

I've added several additional nodes for Parcels, as shown above. I'm not sure if the naming works or is clear enough.
The PolyCurves node will provide all the parcel loops as individual polycurves for each parcel, but I don't know that enough users would understand that there are potentially more than one. I created a separate ExteriorCurve and InteriorCurves node, to hopefully make it more clear, but having those separate makes the original PolyCurves node irrelevant.