Completed beta gradingInfo function

Deleted prints made for testing and set the function to output a list
of the useful values.
Preparing for studentScores function

Created a def that effectively does nothing but doesn't cause an error.
Moved descriptions of each function from assignment from outside the
respective function's definition to inside of them so that they can be
collapsed.
Updated studentScores function

Began work on recognizing where to find the relevant data in the file.
The casefold() method forces all chars in a string to lowercase.
Since both "Name" and "SSN" should always appear in the column headers
of the input file but because one of them may appear in another line,
the check for the correct line includes both of them.