Translate CoC into Japanese

[sanscontext]

We would like to provide a translation of our Code of Conduct into Japanese. If you're interested in working on this, please assign yourself and use this issue for coordination.

Please name the markdown file with JA at the end. :)

[chikaando]

Food for thoughts. adding some references of other companies's CoC translation. Please add more. some are ok, some of these are terrible.
https://www.ubuntulinux.jp/community/conduct
http://www1.jp.dell.com/content/topics/segtopic.aspx/commitment/conduct?c=jp&l=ja&s=corp
https://pycon.jp/2016/ja/about/code-of-conduct/

Github:
https://gist.github.com/atsushieno/b6fa985354b5583f027d10618f6d1438
http://atsushieno.hatenablog.com/entry/2016/11/29/234448

https://jp.linux.com/linux-community/blog/236-mirainoitsuka/420060

[RobbKistler]

closed by #28