Clarify installation of Grunt.js

README.md

@@ -27,15 +27,23 @@ Amber is released under the MIT license. All contributions made for inclusion ar
 Building Amber
 --------------
 
-Amber uses [Grunt.js](http://gruntjs.com/) as build system since version 0.10.0.
-To compile Amber on the commandline execute the following commands:
+Amber uses [Grunt.js](http://gruntjs.com/) as build system since version `0.10.0`.
 
-    npm uninstall grunt // only if Grunt.js 0.3 is already installed locally
+If you already have Grunt.js v0.3.x installed locally run the following (otherwise ignore these lines):
+
+    cd ${Amber_DIR}
+    npm uninstall grunt
+
+To install Grunt.js v0.4.x on the commandline execute the following commands:
     
     npm install -g grunt-cli grunt-init
     cd ${Amber_DIR}
     npm install
-    ./node_modules/grunt/bin/grunt
+
+And finally, compile Amber using the following command:
+
+    cd ${Amber_DIR}
+    grunt
 
 For Windows support check the [Grunt.js on Windows](http://gruntjs.com/frequently-asked-questions#does-grunt-work-on-windows) page.