Diff of iPhone/Halide

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- 元Appleのデザイナーと元Twitterのエンジニアがチームを組んだプレミアムiPhoneカメラアプリHalide
--  http://jp.techcrunch.com/2017/05/31/20170530ex-apple-designer-former-twitter-engineer-launch-halide-a-premium-iphone-camera-app/