Fix ja-JP locale
Fix improving subject

Now it works with a subject including line breaks
Merge pull request #2 from tsukkee/fix-japanese-locale

Fix ja-JP locale
Translate remained Japanese comments to English
Merge pull request #3 from tsukkee/fix-improving-subject

Fix improving subject
Merge pull request #4 from tsukkee/try-translate-comments

Translate remained Japanese comments to English