translate Interpolation
Japanese translation from Mixins to Rest Parameters
Merge pull request #8 from yukihr/master

Mixins から Rest Parameters までの日本語翻訳
Merge pull request #7 from mitsuruog/master

[監訳希望] Interpolation
Reflect issue #1
Wikify translation contents
Merge remote-tracking branch 'enja-oss/master' into for-supervise