configuration.mdの翻訳漏れ対応
Refactor docs/datafiles.md
deprecated の訳語修正
Add missing translation of installation.md
Merge pull request #77 from satoso/iss-61

configuration.mdの翻訳漏れ対応 fix #61
Merge pull request #80 from chezou/add-mt-installation

Add missing translation of installation.md fix #39
Merge pull request #78 from satoso/refactor-datafiles

Refactor docs/datafiles.md