upgrade to actix 0.4

guide/src/qs_3_5.md

@@ -195,13 +195,8 @@ fn main() {
 }
 ```
 
-It is possible to use unix signals on compatible OSs. "signal" feature needs to be enabled
-in *Cargo.toml* for *actix-web* dependency.
-
-```toml
-[dependencies]
-actix-web = { git = "https://github.com/actix/actix-web", features=["signal"] }
-```
+It is possible to use signals. *CTRL-C* is available on all OSs, other signals are 
+available on unix systems.
 
 Then you can subscribe your server to unix signals. Http server handles three signals:
 

guide/src/qs_9.md

@@ -23,15 +23,15 @@ impl Actor for Ws {
 /// Define Handler for ws::Message message
 # impl StreamHandler<ws::Message> for Ws {}
 impl Handler<ws::Message> for Ws {
-    fn handle(&mut self, msg: ws::Message, ctx: &mut HttpContext<Self>) -> Response<Self, ws::Message>
-    {
+    type Result=();
+    
+    fn handle(&mut self, msg: ws::Message, ctx: &mut HttpContext<Self>) {
         match msg {
             ws::Message::Ping(msg) => ws::WsWriter::pong(ctx, &msg),
             ws::Message::Text(text) => ws::WsWriter::text(ctx, &text),
             ws::Message::Binary(bin) => ws::WsWriter::binary(ctx, bin),
             _ => (),
         }
-        Self::empty()
     }
 }