Add readme

Author: TrySound

README.md

@@ -0,0 +1,17 @@
+# postcss-icss-url [![Build Status][travis-img]][travis]
+
+[PostCSS]: https://github.com/postcss/postcss
+[travis-img]: https://travis-ci.org/css-modules/postcss-icss-url.svg
+[travis]: https://travis-ci.org/css-modules/postcss-icss-url
+
+## Usage
+
+```js
+postcss([ require('postcss-icss-url') ])
+```
+
+See [PostCSS] docs for examples for your environment.
+
+# License
+
+MIT © [Bogdan Chadkin](mailto:trysound@yandex.ru)