requirements.html 翻訳完了
installation/instructions.html 翻訳途中
Merge pull request #446 from kenjis/fix_requirements

requirements.html 翻訳完了
Merge pull request #447 from kenjis/fix_install

installation/instructions.html 翻訳途中
Merge pull request #448 from sharkpp/1.7/develop_japanese

classes/validation/* 翻訳