Add Readme

Author: frostney

README.md

@@ -1,2 +1,25 @@
 # rollup-plugin-alias
-Provide an alias for modules in Rollup
+Define aliases when bundling packages with Rollup.
+
+[![Build Status](https://travis-ci.org/frostney/rollup-plugin-alias.svg?branch=master)](https://travis-ci.org/frostney/rollup-plugin-alias) [![Dependency Status](https://david-dm.org/frostney/rollup-plugin-alias.svg)](https://david-dm.org/frostney/rollup-plugin-alias) [![devDependency Status](https://david-dm.org/frostney/rollup-plugin-alias/dev-status.svg)](https://david-dm.org/frostney/rollup-plugin-alias#info=devDependencies) [![Coverage Status](https://coveralls.io/repos/github/frostney/rollup-plugin-alias/badge.svg?branch=master)](https://coveralls.io/github/frostney/rollup-plugin-alias?branch=master)
+
+## Installation
+```
+npm install rollup-plugin-alias
+```
+
+## Usage
+```
+import { rollup } from 'rollup';
+import alias from 'rollup-plugin-alias';
+
+rollup({
+  entry: './src/index.js',
+  plugins: [alias({
+    somelibrary: './mylocallibrary'
+  })],
+});
+```
+
+## License
+MIT, see `LICENSE` for more information