docs(readme): add README.md

Author: jaebradley

README.md

@@ -0,0 +1,9 @@
+# `example-rollup-library`
+
+[![Greenkeeper badge](https://badges.greenkeeper.io/jaebradley/example-rollup-library.svg)](https://greenkeeper.io/)
+[![Build Status](https://travis-ci.org/jaebradley/example-rollup-library.svg?branch=master)](https://travis-ci.org/jaebradley/example-rollup-library)
+[![Codecov](https://img.shields.io/codecov/c/github/jaebradley/example-rollup-library.svg)](https://codecov.io/gh/jaebradley/example-rollup-library)
+[![npm](https://img.shields.io/npm/dt/example-rollup-library.svg)](github-https://www.npmjs.com/package/example-rollup-library-client)
+[![npm](https://img.shields.io/npm/v/example-rollup-library.svg)](https://www.npmjs.com/package/example-rollup-library)
+
+Example `rollup.js` library.