Adds ability to step through contrast, direction, SF, TF, or size

Signed-off-by: Lindsey <glickfeld@neuro.duke.edu>
LG- fixed some loop errors

Signed-off-by: Lindsey <glickfeld@neuro.duke.edu>
Added matrix combos for SFxTF and SFxDir

Signed-off-by: Lindsey <glickfeld@neuro.duke.edu>
Adjust folders- LG

Signed-off-by: Lindsey <glickfeld@neuro.duke.edu>
added new variables

Signed-off-by: Lindsey <glickfeld@neuro.duke.edu>
fixed & and < syntax

Signed-off-by: Lindsey <glickfeld@neuro.duke.edu>