Upgrade to Normalize.css 4.0.0
Upgrade to Normalize.css 4.0.0

I noticed there was a new release of Normalize.css, which was released this weekend. At https://github.com/necolas/normalize.css/blob/master/CHANGELOG.md#400-march-19-2016 you can find the changelog. The main reason for me to upgrade is better comments which explain more and to identify opinionated styles

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