French translations

Hi Alessandro,
I'm sending 3 new french translations: numbers 100, 101, 102 (and a fix for Nº1).
I hope to add at least one a day until XMas.

Please tell me if the formatting is correct and if you need me to patch things up.
For example I used quotes « like this » in case 100 which I took from another FR translator,
but "like this" in the others, which I took from Qi's commits.

Cheers,