Update README.md

Author: RobLoach

README.md

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 jQuery Component
 ================
 
-Shim repository for jQuery.
+Shim repository for the [jQuery](http://jquery.com).
+
+Package Managers
+----------------
+
+* [Bower](http://twitter.github.com/bower/): `jquery`
+* [Component](https://github.com/component/component): `components/jquery`
+* [Composer](http://packagist.org/packages/components/jquery): `components/jquery`