Remove unuseful files for stund library

libs/stund/Stun.sln

libs/stund/WinStun/WinStun.cpp

libs/stund/WinStun/WinStun.h

libs/stund/WinStun/WinStun.rc

libs/stund/WinStun/WinStun.vcproj

libs/stund/WinStun/WinStunDlg.cpp

libs/stund/WinStun/WinStunDlg.h

libs/stund/WinStun/res/WinStun.ico

libs/stund/WinStun/res/WinStun.manifest

libs/stund/WinStun/res/WinStun.rc2

libs/stund/WinStun/resource.h

libs/stund/WinStun/stdafx.cpp

libs/stund/WinStun/stdafx.h

libs/stund/WinStunSetup/WinStunSetup.vdproj

libs/stund/client.cxx

libs/stund/client.sln

libs/stund/client.vcproj

libs/stund/id.pem

libs/stund/id_key.pem

libs/stund/nattest