Edited studentScores function // added header grabbing loop

Added a while loop (that maybe could become its own nested function)
that goes through the header line char by char and writes blocks of
alphabetic chars in the line as items of a list called headerList for
later use identifying which average each individual assignment grade
should count toward.
Edited studentScores functions // fixed header while loop

Debugging
Added nested function gradingInfo

With the grades pulled from the file and added to the agradeList list,
this function first matches each item (grade) to its appropriate type
by comparing its position with that of its equivalent header from the
headerList. Then using the parameters for grading set out in the
gradingInfo function, it totals and processes the grades.
i'm very tired

i fixed it