Previously, media queries weren't keep when downloading styles from ref
tags.
It have been fixed so that media attribute are kept when creating style
tags from ref tags.
Add retrieval from le monde diplomatique
Previously, 404 pages were injected in the document when downloading
styles
Now, the downloader returns None when documents are not found
A first example as well as some documentation have been added
The first example builds an article location and download the article as
an html String.
The documentation explains how it has been designed and what is the goal
of the application as well as it's intended architecture
