examples: replace all app.Run(iris.Addr(...)) with app.Listen just for the shake of simplicity, both are doing the same exact thing as it's described on the http listening first example.

Former-commit-id: d20afb2e899aee658a8e0ed1693357798df93462

_examples/view/template_jet_0/main.go

@@ -141,5 +141,5 @@ func main() {
 		port = ":" + port
 	}
 
-	app.Run(iris.Addr(port))
+	app.Listen(port)
 }