Simple USB2 loopback test for use with usb2zynq_loopback repo

This project is meant for testing a USB device that is able to loop back data transfers on three endpoints (an example of such a device is provided in usb2zynq_loopback repo); it should be run on a Windows OS. To compile this project, you’ll need to add libusb.h, libusb-1.0.lib, and libusb-1.0.dll files to the project directory (see libusb). You also need to make sure that your USB device is using the Winusb driver. This can be done by downloading and running Zadig.