Fully loads XML file into objects, including CourseGrades. Had to modify MyCourse to have a method which returns the number of students. loadXML.java is now parseXML.java, which will contain a public method for loading and a public moethod for saving.
Forgot to add parseXML.java to the last commit. Including it in this one.
Merge pull request #19 from GarbageElitist/load_xml_object

XML file now fully loaded into objects, including CourseGrades