Added a function getCourseDetails(), which returns the base url, term, and course, which helps in getting the total link to a specific gradeable on the output page. These changes are untested.

From the MakefileHelper, I used REPORTS_DIRECTORY to make the link work for all courses and semesters. Fixed the URL.

Made an extra check to see that the gradeable has actually been released to view the link to the gradeable itself, otherwise this would be useless. Also, added the blue box permanently to be displayed along with the gradeable names that have links.

The logic here is that starting from DISPLAY_GRADE_DETAILS, I find a random user (the first user after AVERAGE AND STDDEV, could be the instructor who opened the course). Then, I call the getGreadeableType function to go to their summary json and scan for the gradeable id. If the gradeable id is found, I return the value of gradeable_type.