#2 27c3 schedule problems

[tg]

After I added the 27c3 schedule from http://events.ccc.de/congress/2010/Fahrplan/schedule.en.xml
the following problems occured:

- conference tab: a "select conference" button appeared and because of that the conference info area became too small to read and there's no scrolling
- day view: the timestamp groupings are incorrect, e.g. in the 01:45-03:15 group there's a presentation from 11:30-12:30