TryGhost/Ghost — pull request #1693 by chibicode (2013-12-16 19:36:39+00:00)
Title: Translate the rest of japanese doc

@ErisDS I messed up Git on my previous Japanese translation PR (https://github.com/TryGhost/Ghost/pull/1649), so I opened a new PR w/ squashed commits. Typos should be fixed.

- [x] `usage/*.md`
- [x] `mail/index.md`
- [x] `themes/index.md`