Update advanced/README.md directory structure

apps/advanced/README.md

@@ -17,19 +17,23 @@ DIRECTORY STRUCTURE
 ```
 common
 	config/				contains shared configurations
+	mail/				contains view files for e-mails
 	models/				contains model classes used in both backend and frontend
+	tests/				contains various tests for objects that are common among applications
 console
 	config/				contains console configurations
 	controllers/		contains console controllers (commands)
 	migrations/			contains database migrations
 	models/				contains console-specific model classes
 	runtime/			contains files generated during runtime
+	tests/				contains various tests for the console application
 backend
 	assets/				contains application assets such as JavaScript and CSS
 	config/				contains backend configurations
 	controllers/		contains Web controller classes
 	models/				contains backend-specific model classes
 	runtime/			contains files generated during runtime
+	tests/				contains various tests for the backend application
 	views/				contains view files for the Web application
 	web/				contains the entry script and Web resources
 frontend
@@ -38,6 +42,7 @@ frontend
 	controllers/		contains Web controller classes
 	models/				contains frontend-specific model classes
 	runtime/			contains files generated during runtime
+	tests/				contains various tests for the frontend application
 	views/				contains view files for the Web application
 	web/				contains the entry script and Web resources
 vendor/					contains dependent 3rd-party packages