login translation
minor fixes in french translation
ampache.cfg.php.dist: better explanation of the "cryptographic secret" setting

Following Afterster's info on IRC, update the Cryptographic Secret / secret_key section to explain what it does a bit more.
Merge pull request #448 from axelsimon/patch-1

ampache.cfg.php.dist: better explanation of the "cryptographic secret" setting
Merge pull request #439 from arnaudbey/french-transl

French translation
Merge pull request #450 from Psy-Virus/develop

Fixed Clickable Option Names