Updated gradeProcessing nested function // removed rounding

In order to minimize floating point rounding error, all decimal
rounding (i.e. all rounding except for integer numGrade) was removed
from the function.
Since output requires 2 place decimal precision, the rounding will be
handled by the stats function by calling the format method on the float
in printf() syntax.
Updated studentScores function // added P/F conversion

Added a while loop that scans through the opt and letter grade of each
student (opts list) and if the opt is 'P/F', grades A-C in letterGrades
list are converted to 'P' & grades D-F are converted to 'F'.
*Still having problems with string equivalences, thus the condition of
"'P' in opt[o]" rather than "opt[o] is 'P/F'"
Updated scores function // created highLowAvg nested function, formatted class data

highLowAvg function finds the highest and lowest total grades in the
class then computes the average total grade.
Updated scores function // Formatting/spacing

Experimenting with justification.
Updated scores function // Finished summary formatting

Beautiful
Updated scores function // Added "Full Display" condition

Exactly the same as the "Summarize" option but adds a field for "Name"
and displays information for all students except those who are auditing.
Updated scores function // Added "Range" option

Range displays the names of students whose final numerical grades fall
within a user specified range.
The user is prompted to enter the numbers to search between separated
by a comma.
Deleted some whitespace

Yep, that's it.