French language corrections and additions.

Corrected french entries in grammar, spelling, consistency and accuracy.
Added those missing.
Several accents in it.

*Notes*
(SH), meaning Sens Horlogique, is the right translation for (CW) meaning ClockWise.
(SAH), meaning Sens Anti-Horlogique, is the right translation for (CCW) meaning CounterClockWise.
StaticWeapons: Servir since crew members are "servants".
Check http://www.defense.gouv.fr/terre/equipements/armement-individuel-et-collectif/mortier-81-mm-llr

IMHO, "Dienen" would fit better in German btw. Eg. "Der "Schütze 1" bediente das schwere Maschinengewehr"
Merge pull request #875 from 11RDP-LoupVert/patch-3

French language corrections and additions.