implemented support of dark and light theme

components/controllersFeature.js

@@ -19,7 +19,7 @@
     };
 
     app.run(function(){
-        attachControllers(app.rootViewElement, app.di);
+        attachControllers(app.get('rootView'), app.di);
     });
 
     function addControllerMixin(ctrl) {

components/templatesFeature.js

@@ -19,7 +19,7 @@
     }
 
     app.run(function() {
-        readTemplates(app.rootViewElement);
+        readTemplates(app.get('rootView'));
     })
 
     function readTemplates(containerEl) {