chore(README): add doc testing

Author: douglasduteil

README.md

@@ -1,4 +1,4 @@
-# ui-sortable directive [![Build Status](https://travis-ci.org/angular-ui/ui-sortable.png)](https://travis-ci.org/angular-ui/ui-sortable)
+# UI.Sortable directive [![Build Status](https://travis-ci.org/angular-ui/ui-sortable.png)](https://travis-ci.org/angular-ui/ui-sortable)
 
 This directive allows you to sort array with drag & drop.
 
@@ -80,3 +80,33 @@ Feel free to edit any of them for your needs (don't forget to also update the li
 
 - [Simple Demo](http://codepen.io/thgreasi/pen/BlFLp)
 - [Connected Lists](http://codepen.io/thgreasi/pen/apwsb)
+
+
+## Testing
+
+We use Karma and jshint to ensure the quality of the code.  The easiest way to run these checks is to use grunt:
+
+```sh
+npm install -g grunt-cli
+npm install && bower install
+grunt
+```
+
+The karma task will try to open Firefox and Chrome as browser in which to run the tests.  Make sure this is available or change the configuration in `test\karma.conf.js`
+
+
+### Grunt Serve
+
+We have one task to serve them all !
+
+```sh
+grunt serve
+```
+
+It's equal to run separately:
+
+* `grunt connect:server` : giving you a development server at [http://127.0.0.1:8000/](http://127.0.0.1:8000/).
+
+* `grunt karma:server` : giving you a Karma server to run tests (at [http://localhost:9876/](http://localhost:9876/) by default). You can force a test on this server with `grunt karma:unit:run`.
+
+* `grunt watch` : will automatically test your code and build your demo.  You can demo generation with `grunt build:gh-pages`.