Fix cafetaria scraper
Fix cafetaria scraper

- Breakfast is no longer available
- Dessert & beverages are on same page now

Note that we don't catch errors on purpose (e.g. when there is no second
list): this way we know the scraper is broken.

Fixes #351

ZeusWPI/hydra,ZeusWPI/hydra,ZeusWPI/hydra