support for cdc_ether modems

client/CMakeLists.txt

client/src/Modem/BaseModem.h

client/src/Modem/CdcEther.cpp

client/src/Modem/CdcEther.h

client/src/Modem/Modem.h

client/src/Modem/UsbDevice.h

client/src/Modem/VfsPatch.cpp

client/src/Modem/VfsPatch.h

client/src/Modem/dhcp.h

client/src/network/Client.cpp

libusb/libusb.c

libusb/libusb.h

usb_modeswitch/CMakeLists.txt

usb_modeswitch/main.c

usb_modeswitch/usb-modeswitch-2.6.0/usb_modeswitch.c