installation/download.html 翻訳完了
Merge pull request #425 from kenjis/fix_download

installation/download.html 翻訳完了
Update merged files
目次の翻訳（途中）
Update methods.html
Merge pull request #426 from shinagaki/fix_merged

Update merged files
Merge pull request #427 from kenjis/trans_toc

目次の翻訳（途中）
Merge pull request #428 from ounziw/1.7/develop_japanese

Update  validation/methods.html