The only translation so far is french, but more can be added. The browser language
is used thanks to the HTTP languages headers.
There are still some problems with the translation of some strings, I don't know
why this is. See #12
The project is now directly added to the context local g object, and injected on the fly into the urls that need it.
This commits also add ideas found while reading the flask documentation. The project can be enhanced in many ways, some ideas are stated there.
