Discussion - rewrite framework detection layer using Nuget.Frameworks package

[vshapenko]

Hello! I would like to discuss a rewriting of paket framework handling layer using methods from NuGet.Frameworks package. Currently in paket there are alot of custom logic that handles compatibility between tfms along with bunch of hardcoded custom DUs for different frameworks. I propose to not reinvent the wheel and implement logic based on code used in nuget itself.(Framework detection, comparsion and so on). What do you think, @forki ?