add README

README.md

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+# grid
+
+[![NPM version][npm-image]][npm-url]
+[![Unix Build Status][travis-image]][travis-url]
+[![Windows Build Status][appveyor-image]][appveyor-url]
+[![Coveralls Status][coveralls-image]][coveralls-url]
+[![Dependency Status][depstat-image]][depstat-url]
+
+> Grid system
+
+## Install
+
+    npm install --save @nordnetab/grid
+    # or
+    yarn add @nordnetab/grid
+
+## Usage
+
+```js
+import { Grid, Row, Col } from 'grid';
+
+const App = () => (
+  <Grid>
+    <Row>
+      <Col xs={12} sm={8} md={6} lg={4}>
+        …
+      </Col>
+    </Row>
+  </Grid>
+)
+```
+
+See more at https://nordnet.github.io/grid/
+
+## License
+
+MIT © [Nordnet Bank AB](https://www.nordnet.se)
+
+[npm-url]: https://npmjs.org/package/grid
+[npm-image]: https://img.shields.io/npm/v/grid.svg?style=flat-square
+
+[travis-url]: https://travis-ci.org/nordnet/grid
+[travis-image]: https://img.shields.io/travis/nordnet/grid.svg?style=flat-square&label=unix
+
+[appveyor-url]: https://ci.appveyor.com/project/nordnet/grid
+[appveyor-image]: https://img.shields.io/appveyor/ci/nordnet/grid.svg?style=flat-square&label=windows
+
+[coveralls-url]: https://coveralls.io/r/nordnet/grid
+[coveralls-image]: https://img.shields.io/coveralls/nordnet/grid.svg?style=flat-square
+
+[depstat-url]: https://david-dm.org/nordnet/grid
+[depstat-image]: https://david-dm.org/nordnet/grid.svg?style=flat-square