optical flow is working
optical flow for part of the image is working
prepare for hough circle
try hough circle. Very sluggish
Revert "prepare for hough circle"

This reverts commit b157d653cb1b798630932809df0c24b31def5429.
refine finding two notes algorithm
add floor color pick
add floor color pick res files
clean code for colordetector
support floor&2 notes recognition in tutorial_1 mode
merge master