docs(README): include module import description

Author: buzinas

README.md

@@ -23,11 +23,22 @@ If you want to make it works down to IE9, the only thing you need to do is to ad
 <!--[if IE 9]><script src="classList.min.js"></script><![endif]-->
 ```
 
-## RTL Support
+## Usage
 
-Add `direction: rtl;` to your `<div>`'s CSS, and SimpleScrollbar will detect the direction automatically.
+You can use this library as a script tag, or you can import it as a npm module, eg:
+
+### CommonJS
+
+```js
+const SimpleScrollbar = require('simple-scrollbar');
+```
+
+### ES2015 modules
+
+```js
+import SimpleScrollbar from 'simple-scrollbar'
+```
 
-## Usage
 ### Auto-binding
 Include the attribute `ss-container` in any `<div>` that you want to make scrollable, and the library will turn it for you
 
@@ -67,5 +78,10 @@ document.body.appendChild(otherDiv);
 SimpleScrollbar.initAll();
 ```
 
+
+### RTL Support
+
+Add `direction: rtl;` to your `<div>`'s CSS, and SimpleScrollbar will detect the direction automatically.
+
 ## Credits
 Inspired by yairEO's jQuery plugin ([fakescroll](https://github.com/yairEO/fakescroll))

package.json

@@ -1,6 +1,6 @@
 {
   "name": "simple-scrollbar",
-  "version": "0.3.1",
+  "version": "0.4.0",
   "description": "Very simple vanilla javascript library for creating a custom scrollbar cross-browser and cross-devices.",
   "main": "simple-scrollbar.js",
   "repository": {