v0.1.1-alpha.36

Features

• improve plugin api (#15) (5c3d8be)

BREAKING CHANGES

• • 'smooth/document' and '_document.js' have been replaced by "html.js",
    same API as Gatsby

• 'smooth/head' is no longer available, use 'smooth-plugin-react-helmet'
• 'styled-components' requires now a plugin : 'smooth-plugin-styled-components'