Update README.md

Author: subchen

README.md

@@ -30,10 +30,18 @@ Support `controllerUrl/denpendencies` config in `angular-ui-router` and `angular
 
 # Installation
 
+NPM
+
 ```shell
 npm install angular-async-loader
 ```
 
+BOWER
+
+```shell
+bower install https://github.com/subchen/angular-async-loader.git
+```
+
 # Usage
 
 See Sample: https://github.com/subchen/angular-async-loader/blob/master/sample/