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/routing/reverse/main.go

@@ -35,5 +35,5 @@ func main() {
 	//
 	// See view/template_html_4 example for more reverse routing examples
 	// using the reverse router component and the {{url}} and {{urlpath}} template functions.
-	app.Run(iris.Addr(":8080"))
+	app.Listen(":8080")
 }