WIP: Minicircuits 4SPDT driver fix for .NET 4.5+ versions

[ThorvaldLarsen]

There are two different dll files depending on the version of .NET on the system: .Net 4.5 and above: mcl_RF_Switch_Controller_NET45.dll Earlier .Net versions: mcl_RF_Switch_Controller64.dll

Had a quick look but couldn't find an easy way to check the .NET version from python although would expect it should be possible. The most rudimentary solution is to just try importing both and renaming the package in python as shown suggested here but would be nice with a cleaner implementation.