Changes to keyboard input and saving code.
(1) Renamed processResponse to processResponseStaircase
(2) Added takeKeyboardInput
This file Gets Input and Changes Displayed Image
(3) Modified process_response
We added data saving for both scell and text file
It also process the response for both MCS and staircase
It also opens the data file and prints a header
Removed a large chunk of old code and moved functionality to other subfiles
Both files are not tested on the BF computer yet
BF_display_Start still has messy demo code