Source of GoImagick

TITLE:Go Imagick

- https://github.com/gographics/imagick

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- GoImagick詳解 (GoCon2016Spring用)
--  https://speakerdeck.com/yoya/goimagicksyokai

- GoImagickでサムネール作成
--  https://speakerdeck.com/yoya/goimagickthumbnail