Diff of Quorum

• The added line is THIS COLOR.
• The deleted line is THIS COLOR.
• Go to Quorum.

- https://ja.wikipedia.org/wiki/Quorum

- 最近よく聞くQuorumは過半数(多数決)よりも一般的でパワフルな概念だった
--  http://qiita.com/everpeace/items/632831371da5ff215995