vweb: add vweb.run_app(app,port); fix compilation of vweb_assets/main.v

examples/vweb/vweb_assets/main.v

@@ -8,8 +8,8 @@ const (
 	port = 8081
 )
 
-pub struct App {
-mut:
+struct App {
+pub mut:
 	vweb vweb.Context
 }
 

vlib/vweb/vweb.v

@@ -128,15 +128,14 @@ pub fn (ctx &Context) get_header(key string) string {
 
 //}
 
-pub fn foo<T>() {
-
-}
-
 pub fn run<T>(port int) {
-//pub fn run<T>(app mut T, port int) {
+	mut app := T{}
+	run_app<T>(mut app, port)
+}    
+
+pub fn run_app<T>(mut app T, port int) {
 	println('Running a Vweb app on http://localhost:$port ...')
 	l := net.listen(port) or { panic('failed to listen') }
-	mut app := T{}
 	app.vweb = Context{}
 	app.init()
 	//app.reset()