Copy in_forward.txt ja/inforward.txt
Translate ja/in_forward.txt in Japanese
add ltsv and nginx descriptions
Replace Fluent-cat with fluent-cat in ja/in_forward.txt
Merge pull request #61 from suzukaze/in_forward-plugin

Replace Fluent-cat with fluent-cat in in_forward.txt
Merge pull request #57 from suzukaze/ja-in_forward-plugin

Translate ja/in_forward.txt in Japanese