Prototype web scraper for requirements

The requirements of the degrees Karsten is interested in are on the web and can be scraped. In the event PDF parsing doesn't work, this will serve as an alternative method for loading the requirements. The task will consist of:

• identifying all the relevant courses
• building a concurrent web scraper
• returning everything as an object

The parsing of the prerequisites of the course is more complex and can be left to a future issue. Furthermore, the identification of the relevant courses is a separate task.