French translation for SteemPi

This translation and pull request is in direct response to @techtek's post SteemPi the open source TV-box project that connects with Steem | Now on Utopian.io and makes this project 100% translated in french.

But translation is not the only thing that was done for this project, all the modified and created .po files need their .mo files transpiled. As an example, here is how I've done that:

msgfmt modules/settings/locale/en/LC_MESSAGES/settings.po --output-file modules/settings/locale/en/LC_MESSAGES/settings.mo

The pull request files shows everything that was done, but here is the english text and french translation for your reviewing pleasure:

/modules/feed/locale/fr/LC_MESSAGES/feed.po
msgid "Feed"
msgstr "Flux"

/modules/settings/locale/de/LC_MESSAGES/settings.po
msgid "language fr"
msgstr "Französisch (français)"

/modules/settings/locale/en/LC_MESSAGES/settings.po
msgid "language fr"
msgstr "French (français)"

/modules/settings/locale/fr/LC_MESSAGES/settings.po
msgid "username"
msgstr "Nom d'utilisateur"

msgid "language"
msgstr "Langage"

msgid "settings saved successfully"
msgstr ""
"Les paramètres ont bien été enregistrés."
"Dans quelques secondes, SteemPi sera redémarré."

msgid "save"
msgstr "Sauvegarder"

msgid "language en"
msgstr "Anglais (english)"

msgid "language fr"
msgstr "Français"

msgid "language de"
msgstr "Allemand (deutsch)"

msgid "language nl"
msgstr "Néerlandais (nederlands)"

msgid "main settings"
msgstr "Paramètre général"

msgid "module activation status"
msgstr "État du module d'activation"

msgid "module order"
msgstr "Ordre des modules"

msgid "main ledtests"
msgstr "test DEL"

msgid "backgrounds"
msgstr "Arrière-plans"

/modules/settings/locale/nl/LC_MESSAGES/settings.po
msgid "language fr"
msgstr "Frans (french)"

/modules/stats/locale/fr/LC_MESSAGES/stats.po
msgid "Stats"
msgstr "Statistiques"