Improve hsv based thresholding logic

[timeamagyar]

Hi Justin,

First of all many thanks for sharing your computer vision project, it served as a very good starting point for one of my projects!
Meanwhile, i added a small improvement to your hsv based thresholding logic. Simplified the threshold computation logic using bitwise AND for all colors that are continuous and bitwise OR for the discontinuous color red. This way you do not have to make any explicit checks for negative values and you do not have to provide negative lower threshold values either. Also, do not know if this is intentional but in your picture you completely cut off the cool red portion by providing hThresholdLow = -359/360;

Cheers,
Timea