Exclude invisible files
Add CMU Serif to preferred typeface list
Allow intuitive relative links
Add full license text
Add notes media folder
Exclude dropped classes
Improve sorting order
Visually separate semesters in course list
Add "Report error" link
Improve footer markup
Add source code link
Add favicon
Make course list look better
Add `/courses` redirect
Fix ugly syntax highlighting
Add owlnet link
Add syntax highlighting
Add class titles to index
Improve mobile and other styles
Give up on aligning anchors