Support a CDN to load resources

It would be nice if you could support loading resources from a CDN. Google hosts everything
at theirs for example.

def resources = { attrs ->
def theme = attrs.theme ?: 'ui-lightness'
def plugin = pluginManager.getGrailsPlugin('jquery-ui')
def jqver = plugin.instance.JQUERYUI_VERSION
// If a plugin is using THIS plugin, if they change theme they need to be able
// to specify their plugin name so we can load the theme!
def plug = attrs.theme ? attrs.plugin : 'jqueryUi'
if(attrs?.useGoogleCDN.equals("true")) {
out << """<link href="http://ajax.googleapis.com/ajax/libs/jqueryui/$

{jqver}/themes/${theme}/jquery-ui.min.css" type="text/css" rel="Stylesheet" />"""
out << """<script src="http://ajax.googleapis.com/ajax/libs/jqueryui/${jqver}

/jquery-ui.min.js"></script>"""
} else

{ def themedir = attrs.themeDir ? attrs.themeDir + '/' + theme : 'jquery-ui/themes/'+theme out << resourceLink(plugin: plug, type:'css', dir: themedir, file:'jquery-ui-'+jqver+'.custom.css', media:'screen, projection') out << resourceLink(plugin: 'jqueryUi', type:'js', dir:'jquery-ui/js', file:'jquery-ui-'+jqver+'.custom.min.js') }

}