Add livereload to the default Gruntfile.

When you do grunt watch it'll now start a livereload server which will tell the browser to reload on codechanges.
You can use the KunstmaanLiveReloadBundle to inject the livereload script in your page in the dev environment.
Merge pull request #62 from Kunstmaan/add_livereload_to_gruntfile

Add livereload to the default Gruntfile.