Student is archived when removed and then turned into a ghost student. parseXML now works with new way of storing grades.
Merge pull request #32 from GarbageElitist/remove_student

Student is archived when removed and then turned into a ghost student. p...
Added methods into Assignment and AssignmentCategory to compute average grades
Merge pull request #1 from VanGrack/course_statistics

Added methods into Assignment and AssignmentCategory to compute average grades
Merge pull request #34 from VanGrack/master

Added methods into Assignment and AssignmentCategory to compute average grades
removing ghostGraderBook
rename interface to interfaces
Add openfile.java and loadXML.java into io
Merge pull request #36 from LilongHuang/lilongBranch

Fixing UI
Merge pull request #2 from spockNinja/master

Pulling in Master