l10n: Updating french locale
Merge pull request #645 from lissyx/locale.fr

l10n: Updating french locale
Commit from Mozilla Verbatim by user inma610.: 318 of 318 strings translated (0 fuzzy).
Commit from Mozilla Verbatim by user inma610.: 318 of 318 strings translated (0 fuzzy).
Merge branch 'master' of github.com:mozilla/fireplace
Commit from Mozilla Verbatim by user kohei.yoshino@gmail.com.: 318 of 318 strings translated (0 fuzzy).
Commit from Mozilla Verbatim by user kohei.yoshino@gmail.com.: 318 of 318 strings translated (0 fuzzy).