Localization support?

[julien-me]

Hi, thanks for what looks like a cool and ambitious project.

I see there are localization files for en/es/pt but unless I'm mistaken they seem not to be used anywhere? In any case I can provide a PR for a french translation if that's welcome.

[tvallotton]

Hi, you are right, so far they are not being used. That is because I still haven't figured out how they should be integrated in an extensible yet non invasive way into the project. As I've planned it, I will probably move that functionality into a separate crate so the logic can be shared by other rocket related projects I plan to work on. (btw you are very welcome to contribute)