1) Remove Init()
2) Call Reset() via CardManager
3) Call Destroy() via CardManager (only used by Disks/Harddisk) on WM_DESTROY
The only "real" changes are in CSuperSerialCard: ensure destructor cleans up and remove Destroy().
. tfe.cpp renamed to Uthernet1.cpp.
. add class NetworkBackend: common to both U1 and U2 cards, and abstracts Windows/Linux backends.
. modernise error message if WPCAP.DLL is not installed.