Working on Vector drawing
Added drawings for the Vectors
Real time Head direction showing on color frame
Updated DEpth SPace
Updated Calculator Class with GazeConvergence

Added gaze convergence.
Calculates midpoint of all points of people more than 1. then calculates
the distance between them.
Calculates orientation of all people and creates directional points.
Calculated midpoint and distance between the vectored points.

If the average distance between the vectored points and the actual
joints is lower, then gaze is converging.
Completed gaze convergence detection
Merge branch 'master' of https://github.com/asmusj224/css490Project