removed constructor and private attribute for VisionOps class since they
were needed for threads but now aren't
added a TODO: we convert to and from BufferedImages, can remove that to
speed up things
Also adding experimental vision code - we currently do binary
thresholding on RGB values and the code does that on HSV values instead
- the code was semi-successful and since I don't know what to do with it
I put it in the history - we can always pick it up.