OpenCV 4 Upgrade

I just recently upgraded OpenCV for Processing to version 4.4.0. It uses the pre-compiled binaries provided by the javacpp project and thus supports every major operating system as well as armhf & arm64.

All the examples should run without adaptation, I changed just some minor things under the hood to make it working with the new OpenCV version.

You can download the release here and try it out. Would be great to get some feedback (if it works on raspberry for example).

If it works and is tested by others (not only me), I will contact Greg so that we are able to share it through the contribution manager.