elaborate on purpose, list jspm and Component

Author: BrianSipple

README.md

@@ -1,12 +1,18 @@
 Ember.js
 ========
 
-Shim repository for [Ember Application Framework](http://emberjs.com/).
+_Shim repository for [Ember Application Framework](http://emberjs.com/)._
 
 This package provides the core of the ember.js framework.
 
+When a new [build is released](http://emberjs.com/blog/2013/09/06/new-ember-release-process.html),
+package managers that don’t perform their own remote storage for
+distribution files can be instructed to find them here.
+
 Package Managers
 ----------------
 
 * [Bower](http://bower.io): `ember`
+* [Component](http://component.github.io/): `components/ember`
 * [Composer](http://packagist.org/packages/components/ember): `components/ember`
+* [jspm](http://jspm.io/): `github:components/ember`