--spell check on some comments
--correcting the weights for the distance comparison
--moving to step3,
--step3 changes
----processCircle will process a frame only when 'n' or 'N' is pressed
----the last roiOutputImage is overlayed on the top-left corner of video output=t
----more aggressive pruning of contours in SpotIt::processCircle before clustering
----more statistics is outputted for contours who passed the pruning`:w
----draw cluster centers also
----found out an eggregious error in clustering. need to debug it later
----improved custom initialization by disreagrding contours with length < 100