new version

using avi
update
almost complete
update csv reader
add skeleton reader
Initial Commit
Convert CSV files to tuple
Read frames of video and construct callback
Move the window to the front
Draw hand area
Separate Visualization and Debug message flag
Crop image and Display
Merge result with video to the same window
Handle cases when multiple videos are loaded
Use threshold to remove background around the hand
Separate reading frame from the loop
Remove useless argument and store cropped hands to a list
Save result image to a video
Prompt user when saving the video
Add border for cropped hand image