fixes, i18n, sitemap generator and new examples

Former-commit-id: 54801dc705ee0fa66232f65063f8a68c9cc31921

context/application.go

@@ -17,6 +17,9 @@ type Application interface {
 	// Logger returns the golog logger instance(pointer) that is being used inside the "app".
 	Logger() *golog.Logger
 
+	// I18nReadOnly returns the i18n's read-only features.
+	I18nReadOnly() I18nReadOnly
+
 	// View executes and write the result of a template file to the writer.
 	//
 	// Use context.View to render templates to the client instead.