l10n: fr translation for v2.0.0rc0 (2228t)

Signed-off-by: Jean-Noel Avila <jn.avila@free.fr>
Signed-off-by: Matthieu Baerts <matttbe@gmail.com>
Signed-off-by: Xavier Mehrenberger <xavier.mehrenberger@gmail.com>
Merge branch 'fr-po' of git://github.com/jnavila/git

* 'fr-po' of git://github.com/jnavila/git:
  l10n: fr translation for v2.0.0rc0 (2228t)
l10n: zh_CN.po: translate 46 new messages (2229t0f0u)

Translations for git v2.0.0-rc0.  Also correct translatioins on relative
date in date.c with help from Brian Gesiak ($gmane/246390).

Signed-off-by: Jiang Xin <worldhello.net@gmail.com>