Add translations files in French and German

Summary:
Added translation using Weblate (French)

Translated using Weblate (French)

Currently translated at 6.0% (11 of 181 strings)

Added translation using Weblate (German)

Reviewers: valerio.bozzolan

Reviewed By: valerio.bozzolan

Subscribers: valerio.bozzolan, Libre BusTO

Tags: Libre BusTO

Differential Revision: https://gitpull.it/D172