updated references to "course_section" across the board
... well, as much as I could find as of now. Cleaning up various references to "section" or "coursesection" so that we are consistent
sample_db reflects changes in the "course_sections" references...
updated filter fields
"halfway" there with this commit - the Grades API still handles course as if it were a section
so that I don't break angular when David needs it most!