New aspect ratio and minor fixes in UI!

Hi everyone,

Took me a little while, but the game is finally updated in its (probably) final form.
Here a list of things I fixed:

* Screen ratio! You can now play in 16:9, 4:3 or native (it's really small, be prepared!)
* A couple of translation fixes in the french UI
* Some UI Buttons didn't have the correct text

The ROM can't be changed or you'll all lose your saves, so.... sorry for the typos I can't fix anymore.

Take care and see you soon for new games,

Yann