Add test code for initializing Course with name
Add code for initializing Course with name
Add test code for initializing Course with name and credit hours
Add code for initializing Course with name and credit hours
Add test code for getting name and credit hours
Add code for getting name and credit hours
Add test code to test excpetions when initializing
Add test code for set methods
Add code for set methods
Add test code adding and getting categories
Add code adding and getting categories
Add test code for calculating course grade
Add test code for calculating number of grades entered in a category
Add code for calculating number of grades entered in a category
Add test code for getting and setting target grade for a course
Add code for getting and setting target grade for a course
Add test code for calculating the needed course grade
Add code for calculating the needed course grade
Add more test cases for calculating the needed course grade
Remove unnecessary files