Official CUDA-Enabled Builds

[Breakthrough]

I've made some progress in building the opencv-python module here on GitHub, and have also reviewed the EULA and licensing requirements for distributing artifacts from the CUDA SDK. It should be possible to provide official DVR-Scan builds with CUDA support in the future.

This is a relatively high commitment but clearly there is interest from the community, so I've created a new repo to work on a prebuilt Python OpenCV package that includes everything needed to work out of the box: https://github.com/Breakthrough/opencv-python-cuda

Main tasks:

• [ ] Get .whl built on GitHub that includes all required .DLLs
• [ ] Provide a signed portable release
• [ ] Bring binary size down by excluding unnecessary packages, see if we can get the size low enough to have a unified distribution