Add WebPage class (task 11)
Includes init, load, save and new_article methods
Add task 12 (Fetching articles)
All associated tests seem to pass
Add task 13 (Authors)
Not entirely sure if it passes all tests.
The Exceptions seems to be failing now
Add task 14, almost complete!
Currently getting 1 failure, and 1 error
Also added some refectoring; use select{} instead of reject{} with !
Refactor sub optimal code