Update classes/router.html
Merge pull request #450 from shinagaki/fix_router

Update classes/router.html
installation/instructions.html 翻訳完了
Merge pull request #451 from kenjis/fix_install

installation/instructions.html 翻訳完了
Update classes/finder.html
Merge pull request #452 from shinagaki/fix_finder

Update classes/finder.html