.NET support

[mo khan]

From reading the license finder documentation it's a little unclear to me how well .NET Framework vs .NET Core is supported by `license_finder`.

From reading the code it looks like `license_finder` supports .NET Framework via the nuget package manager when run under mono. From what I can understand, `mono` is mostly equivalent to `.NET Framework`. 

Does `mono` cover all usages of .NET Framework? Are there limitations? E.g. MS Windows specific dependencies.

.NET Core appears to be covered by the `dotnet` package manager. This seems pretty straight forward.