License issue of nvPY for Windows

[yuuki0xff]

nvPY has provided prebuilt binaries (nvpy-windows.zip) for a few years ago. It contains nvPY source code, Python interpreter, and required libraries. But the About dialog only displays the nvPY license.

nvPY must display licenses for all software included in the nvpy-windows.zip.

[yuuki0xff]

The About dialog is too poor to display the license.

Generate a licenses.txt when building binaries, and include it in a zip file. This method is probably the easiest.