ja-po: add a few translations
ja-po: Add Japanese translations
Merge pull request #1 from narusemotoki/add-ja

Add Japanese translations
ja.po: Add some translations for branch.c.

Signed-off-by: Brian Gesiak <modocache@gmail.com>
ja.po: Add some translations for clean.

Signed-off-by: Brian Gesiak <modocache@gmail.com>