Added Contents.m to data/human

Signed-off-by: David Brainard <brainard@psych.upenn.edu>
Update a little

Signed-off-by: David Brainard <brainard@psych.upenn.edu>
Worked on v_Cones and updated its validation data.

Signed-off-by: David Brainard <brainard@psych.upenn.edu>