Student Evaluations spike

Lists student evaluations that are currently open, grouped by course.  You can then choose an evaluation and it will show all questions, including sections for global questions and instructor based questions.

We might eventually fold all global questions into the main body of questions and just have sections for Instructor/TA questions, but this can be changed easily later.

No caching of courses (or questions or scales) has been done yet, so it's currently all being SQL queried each time