improved styling for pdf export
[confetti] / courses /
drwxr-xr-x   ..
-rwxr-xr-x 5357 courses.sh
-rwxr-xr-x 1129 edit_course.sh
-rwxr-xr-x 839 export_ical.sh
-rwxr-xr-x 4678 export_pdf.sh
-rwxr-xr-x 721 index.cgi
-rwxr-xr-x 2387 l10n.sh
-rwxr-xr-x 3956 list.sh
-rwxr-xr-x 1361 new_course.sh
-rwxr-xr-x 5544 update_course.sh
-rwxr-xr-x 10274 widgets.sh