add a new 'Context.GzipReader(bool) method and 'iris.GzipReader' middleware as requested at #1528

Former-commit-id: 7665545069bf1784d17a9db1e5f9f5f8df4b0c43

_examples/http_request/read-body/main.go

@@ -12,6 +12,9 @@ func main() {
 
 func newApp() *iris.Application {
 	app := iris.New()
+	// To automatically decompress using gzip:
+	// app.Use(iris.GzipReader)
+
 	app.Use(setAllowedResponses)
 
 	app.Post("/", readBody)