Beginning of CLEAN UP PROJECT.
First step - superficial formatting changes in exp file.
Edits to exp file only
Created new method for iterating through each trial
Deleted all scell stuff
Also added "demo_stim_duration"
Completed first draft of removing scell.
NOT YET TESTED ON BF DISPLAY
Major Changes:
Replaced scells with a giant experiment matrix.
Only one save method, but saves two files
Text file saves trial data and responses
.Mat file saves important variables (to allow continuation)
process_response file is totally different

Minor Changes:
Added "turn lens on" message
Added demo stim duration
Added "out of" to block counter message
Changed method of block presentation text
Changed order of operations so there is no block break at end of experiment
Many important clarifications in comments
ALSO, added allcomb, which makes combinations of variables.
Used in the exp file.