You are free to fork my jmonkeyengine-virtual-reality under the jMonkeyEngine GitHub organization. I'm going to work on my repository, just as I do with jME3, though. Personally, I don't like being bound by "official" jME3 authorization for changes to libraries -- I've got real money riding on this software, so I want to be in control of my code on my own time, which GitHub allows us all to do. I plan on making the virtual reality library easy for anyone to use & integrate easily with my jME3 branch. I don't plan on making it not compatible with the main jME3 branch, though, I just won't guarantee it.
I really appreciate the SwapBuffers change you made & I did move that into my jME3 branch.