updated readme

README.md

@@ -111,14 +111,13 @@ See how others are using matter.js physics
 
 ### Install
 
-Download the [edge build (master)](https://github.com/liabru/matter-js/blob/master/build/matter.js) or get a [stable release](https://github.com/liabru/matter-js/releases) and include the script in your web page:
+You can install using package managers [npm](https://www.npmjs.org/package/matter-js) and [Yarn](https://yarnpkg.com/) using:
 
-    <script src="matter.js" type="text/javascript"></script>
+    npm install matter-js
 
-You can also install using the package managers [Bower](http://bower.io/search/?q=matter-js) and [NPM](https://www.npmjs.org/package/matter-js).
+Alternatively you can download a [stable release](https://github.com/liabru/matter-js/tags) or try the latest experimental [alpha build](https://github.com/liabru/matter-js/tree/master/build) (master) and include the script in your web page:
 
-    bower install matter-js
-    npm install matter-js
+    <script src="matter.js" type="text/javascript"></script>
 
 ### Usage