changed Frame::addTarget to take a PixelTarget rather than a Target
changed Frame::addTarget to take a PixelTarget rather than a Target

UWARG/computer-vision,UWARG/computer-vision,chrishajduk84/computer-vision,SarahMadigan/computer-vision,chrishajduk84/computer-vision,SarahMadigan/computer-vision,UWARG/computer-vision,chrishajduk84/computer-vision