Array Overhall!

Figured out how I am going to store the data from the surveys that
users will take -- a 2D array! I also put all the courses into arrays
instead of keeping them in a long string. I consolidated the RateSurvey
and RateSubjectCourse classes because I didn't need both of them. The
tasks they were doing were too similar for them to be separate. As I
continue, I may need to re-expand, but with a smarter design. I also
need to comment!