Optional task 1,2

[minhtan7]

1. The user can see a (checkbox) for every unique source of the articles loaded. For example, if the user loads four stories, and two stories are from bbc-news, one from cnn, and one from spiegel-de, the user would see three checkboxes: bbc-news, cnn, spiegel-de.
2. Next to the source name, the user sees a number representing the number of stories from that source. To continue the previous example: bbc-news (2), cnn (1), spiegel-de (1).