Update fr_FR.lang - Githubissues

Updated the localization insofar as it is possible.

Still some quacks about some sentences.
Replaced all occurences of "Crafter" with "Fabriquer" ("Crafter" isn't a valid word, and I'm very picky about this)
Replaced all occurences of "conducteur" with "cinétique" (Just to be closer to the en_US.lang)
Replaced all occurences of "Tag"/"Tagué" with "Peindre"/"Peint" (French isn't that hard of a language, come on!)
Replaced some other things either to be more accurate or to sound better
Fixed some typos

BuildCraft / BuildCraft-Localization