Course element "edubase" eBook reader integration

The edubase ebook reader should be integrated as a new course element. The integration has the following features: 

• Editor

• • Enter one or multiple edubase book references
  • Optionally enter a reading assignment
  • Optionally add start and end page to book
  • Automatic lookup of book cover image and book title
• Runtime
  • If multiple books are configured, present books in a book shelf layout
  • If reading assignments are added, present them next to the book cover
  • Clicking a book cover launches the book
  • Launching of a book creates a SSO request to edubase based on the LTI standard

The course element requires a commercial contract with edubase/edubook. The configuration is done in a new module.