README: add instructions on how to run Grunt on the examples

README.md

@@ -19,3 +19,19 @@ and point your browser to
 
 http://localhost:4000/
 
+Using Grunt.js
+==============
+
+Since Amber 0.10.0 Grunt.js is used as commandline build system.
+To use it with the examples it is first necessary to install all dependencies with
+
+* install grunt-cli globally if not already present: `npm install -g grunt-cli`
+* `cd amber-examples`
+* `npm install`
+
+Afterwards the examples can be built/recompiled by running the following command in
+the subdirectory of each example:
+
+`grunt`
+
+The subdirectories might contain additional README files which might contain additional information.