Update contributing

Author: Rokt33r

contributing.md

@@ -1,16 +1,35 @@
 # Contributing to Boostnote
 
-> This is a temporary document.
+> English below.
 
-It is first time to maintain OSS project for me(Rokt33r). So, I want to watch what's going on here.
+## About Pull Request
 
-**This means you can do whatever you want until I ask to stop it.**
+### やり方
 
-But I want to make only one thing sure.
+現状特に`dev`ブランチを用意しないつもりなので、最新VersionのブランチにPullrequestを送ってください。
 
-**If you make a pull request, It means you agree to transfer the copyright of the code changes to MAISIN&CO.**
+### Pull requsetの著作権
 
-This is because our team want to have an option to change LICENSE of this app.
-> It doesn't mean Boostnote will become a paid app. If we want to earn some money, We will try other way, which is some kind of cloud storage or Mobile app integration.
-> We thought this is needed to replace the license with much freer one(like BSD, MIT).
+Pull requestをすることはその変化分のコードの著作権をMAISIN&CO.に譲渡することに同意することになります。
 
+アプリケーションのLicenseのをいつでも変える選択肢を残したいからです。
+しかし、これはいずれかBoostnoteが有料の商用アプリになる可能性がある話ではありません。
+もし、このアプリケーションで金を稼ごうとするならBoostnote専用のCloud storageの提供やMobile appとの連動、何か特殊なプレミアム機能の提供など形になると思います。
+現在考えられているのは、GPL v3の場合、他のライセンスとの互換が不可能であるため、もしより自由なLicense(BSD, MIT)に変える時に改めて著作権者としてライセンスし直す選択肢を残したいぐらいのイメージです。
+
+---
+
+# Contributing to Boostnote(ENG)
+
+## About Pull Request
+
+### How to
+
+Make a new PR to the branch named latest version. This is because there is no `dev` branch currently.
+
+### Copyright of Pull Request
+
+If you make a pull request, It means you agree to transfer the copyright of the code changes to MAISIN&CO.
+
+It doesn't mean Boostnote will become a paid app. If we want to earn some money, We will try other way, which is some kind of cloud storage, Mobile app integration or some SPECIAL features.
+Because GPL v3 is too strict to be compatible with any other License, We thought this is needed to replace the license with much freer one(like BSD, MIT) somewhen.