Move the dfs stuff into util
Use arrays not objects to store the timetable, send the semester to the cb
Remove debuggin
Generate icals
Add new deps
Parse dates from page later
console.err is nothing
Dont use dates in the ttparse for the weeks, just use the week number
Set the summary to show the lecture type
Just loop over the weeks directly.
Use prelude-ls
Check login and generate an ical
Check that the login is valid