Deleted laser/visual/stim. selection vars

Signed-off-by: Andrew McKinney <mckinney@neuro.duke.edu>
Renamed HADC8 to RewardDelay

Signed-off-by: Andrew McKinney <mckinney@neuro.duke.edu>
Add Sound to "StimOn" Task State & cleanup

Signed-off-by: Andrew McKinney <mckinney@neuro.duke.edu>